123112322120 has 32 divisors (see below), whose sum is σ = 277021409400. Its totient is φ = 49241607168.

The previous prime is 123112322077. The next prime is 123112322141. The reversal of 123112322120 is 21223211321.

It can be written as a sum of positive squares in 4 ways, for example, as 106770790564 + 16341531556 = 326758^2 + 127834^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 123112322092 and 123112322101.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 546992 + ... + 738528.

Almost surely, 2^123112322120 is an apocalyptic number.

123112322120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123112322120 is an abundant number, since it is smaller than the sum of its proper divisors (153909087280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123112322120 is a wasteful number, since it uses less digits than its factorization.

123112322120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207617 (or 207613 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 123112322120 its reverse (21223211321), we get a palindrome (144335533441).

The spelling of 123112322120 in words is "one hundred twenty-three billion, one hundred twelve million, three hundred twenty-two thousand, one hundred twenty".