121528253164 has 24 divisors (see below), whose sum is σ = 212899140720. Its totient is φ = 60699969024.

The previous prime is 121528253137. The next prime is 121528253191. The reversal of 121528253164 is 461352825121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121528253137) and next prime (121528253191).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20796027 + ... + 20801869.

It is an arithmetic number, because the mean of its divisors is an integer number (8870797530).

Almost surely, 2^121528253164 is an apocalyptic number.

It is an amenable number.

121528253164 is a deficient number, since it is larger than the sum of its proper divisors (91370887556).

121528253164 is a wasteful number, since it uses less digits than its factorization.

121528253164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10449 (or 10447 counting only the distinct ones).

The product of its digits is 115200, while the sum is 40.

The spelling of 121528253164 in words is "one hundred twenty-one billion, five hundred twenty-eight million, two hundred fifty-three thousand, one hundred sixty-four".