121520972 has 6 divisors (see below), whose sum is σ = 212661708. Its totient is φ = 60760484.

The previous prime is 121520963. The next prime is 121520977. The reversal of 121520972 is 279025121.

It is not an unprimeable number, because it can be changed into a prime (121520977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15190118 + ... + 15190125.

It is an arithmetic number, because the mean of its divisors is an integer number (35443618).

Almost surely, 2^121520972 is an apocalyptic number.

It is an amenable number.

121520972 is a deficient number, since it is larger than the sum of its proper divisors (91140736).

121520972 is a wasteful number, since it uses less digits than its factorization.

121520972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30380247 (or 30380245 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 121520972 is about 11023.6551107153. The cubic root of 121520972 is about 495.3175828216.

The spelling of 121520972 in words is "one hundred twenty-one million, five hundred twenty thousand, nine hundred seventy-two".