121602156028 has 24 divisors (see below), whose sum is σ = 217661618160. Its totient is φ = 59425036800.

The previous prime is 121602155999. The next prime is 121602156029. The reversal of 121602156028 is 820651206121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121602155984 and 121602156002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121602156029) 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, 1448373 + ... + 1530028.

It is an arithmetic number, because the mean of its divisors is an integer number (9069234090).

Almost surely, 2^121602156028 is an apocalyptic number.

It is an amenable number.

121602156028 is a deficient number, since it is larger than the sum of its proper divisors (96059462132).

121602156028 is a wasteful number, since it uses less digits than its factorization.

121602156028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2978637 (or 2978635 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The spelling of 121602156028 in words is "one hundred twenty-one billion, six hundred two million, one hundred fifty-six thousand, twenty-eight".