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1221030224120 = 23576123173697
BaseRepresentation
bin10001110001001011000…
…100101010000011111000
311022201200200210012001002
4101301023010222003320
5130001132214132440
62332533351144132
7154134160441550
oct21611304520370
94281620705032
101221030224120
11430921802803
12178788675048
138b1b15527c5
1443153588160
1521b66108115
hex11c4b12a0f8

1221030224120 has 192 divisors, whose sum is σ = 3203043704640. Its totient is φ = 410365992960.

The previous prime is 1221030224119. The next prime is 1221030224159. The reversal of 1221030224120 is 214220301221.

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 = 1221030224092 and 1221030224101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 330274112 + ... + 330277808.

It is an arithmetic number, because the mean of its divisors is an integer number (16682519295).

Almost surely, 21221030224120 is an apocalyptic number.

1221030224120 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 1221030224120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1601521852320).

1221030224120 is an abundant number, since it is smaller than the sum of its proper divisors (1982013480520).

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

1221030224120 is a wasteful number, since it uses less digits than its factorization.

1221030224120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4154 (or 4089 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 1221030224120 its reverse (214220301221), we get a palindrome (1435250525341).

The spelling of 1221030224120 in words is "one trillion, two hundred twenty-one billion, thirty million, two hundred twenty-four thousand, one hundred twenty".