| Base | Representation |
|---|---|
| bin | 111001010010000000… |
| … | …1110011011000100000 |
| 3 | 102202111211221021212120 |
| 4 | 1302210001303120200 |
| 5 | 4003411310122240 |
| 6 | 132302133024240 |
| 7 | 11613220264206 |
| oct | 1624401633040 |
| 9 | 382454837776 |
| 10 | 123011020320 |
| 11 | 48194572271 |
| 12 | 1ba10185080 |
| 13 | b7a4c599b6 |
| 14 | 5d4d1bb076 |
| 15 | 32ee4c4ad0 |
| hex | 1ca4073620 |
123011020320 has 96 divisors (see below), whose sum is σ = 387972099648. Its totient is φ = 32761678848.
The previous prime is 123011020289. The next prime is 123011020333. The reversal of 123011020320 is 23020110321.
It is a tau number, because it is divible by the number of its divisors (96).
It is a super-2 number, since 2×1230110203202 (a number of 23 digits) contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (15).
It is a self number, because there is not a number n which added to its sum of digits gives 123011020320.
It is an unprimeable number.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 221787 + ... + 543333.
It is an arithmetic number, because the mean of its divisors is an integer number (4041376038).
Almost surely, 2123011020320 is an apocalyptic number.
123011020320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 123011020320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193986049824).
123011020320 is an abundant number, since it is smaller than the sum of its proper divisors (264961079328).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
123011020320 is a wasteful number, since it uses less digits than its factorization.
123011020320 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 322362 (or 322354 counting only the distinct ones).
The product of its (nonzero) digits is 72, while the sum is 15.
Adding to 123011020320 its reverse (23020110321), we get a palindrome (146031130641).
Subtracting from 123011020320 its reverse (23020110321), we obtain a palindrome (99990909999).
The spelling of 123011020320 in words is "one hundred twenty-three billion, eleven million, twenty thousand, three hundred twenty".
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