121522920 has 32 divisors (see below), whose sum is σ = 364569120. Its totient is φ = 32406080.

The previous prime is 121522909. The next prime is 121522927. The reversal of 121522920 is 29225121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (121522927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 506226 + ... + 506465.

It is an arithmetic number, because the mean of its divisors is an integer number (11392785).

Almost surely, 2^121522920 is an apocalyptic number.

121522920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121522920 is an abundant number, since it is smaller than the sum of its proper divisors (243046200).

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

121522920 is a wasteful number, since it uses less digits than its factorization.

121522920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012705 (or 1012701 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 121522920 is about 11023.7434658105. The cubic root of 121522920 is about 495.3202294800.

The spelling of 121522920 in words is "one hundred twenty-one million, five hundred twenty-two thousand, nine hundred twenty".