121520688 has 40 divisors (see below), whose sum is σ = 314490288. Its totient is φ = 40434432.

The previous prime is 121520687. The next prime is 121520717. The reversal of 121520688 is 886025121.

It is a super-2 number, since 2×121520688² = 29534555223986688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121520683) 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, 29406 + ... + 33282.

Almost surely, 2^121520688 is an apocalyptic number.

It is an amenable number.

121520688 is an abundant number, since it is smaller than the sum of its proper divisors (192969600).

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

121520688 is a wasteful number, since it uses less digits than its factorization.

121520688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4541 (or 4535 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 121520688 is about 11023.6422293179. The cubic root of 121520688 is about 495.3171969614.

The spelling of 121520688 in words is "one hundred twenty-one million, five hundred twenty thousand, six hundred eighty-eight".