121957568 has 28 divisors (see below), whose sum is σ = 243044472. Its totient is φ = 60718080.

The previous prime is 121957553. The next prime is 121957573. The reversal of 121957568 is 865759121.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11471 + ... + 19377.

Almost surely, 2^121957568 is an apocalyptic number.

It is an amenable number.

121957568 is a deficient number, since it is larger than the sum of its proper divisors (121086904).

121957568 is an equidigital number, since it uses as much as digits as its factorization.

121957568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8160 (or 8150 counting only the distinct ones).

The product of its digits is 151200, while the sum is 44.

The square root of 121957568 is about 11043.4400437545. The cubic root of 121957568 is about 495.9100600015.

The spelling of 121957568 in words is "one hundred twenty-one million, nine hundred fifty-seven thousand, five hundred sixty-eight".