121297620738 has 64 divisors (see below), whose sum is σ = 299731645440. Its totient is φ = 31945067712.

The previous prime is 121297620721. The next prime is 121297620761. The reversal of 121297620738 is 837026792121.

It is a happy number.

It is a super-2 number, since 2×121297620738² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2024556 + ... + 2083607.

It is an arithmetic number, because the mean of its divisors is an integer number (4683306960).

Almost surely, 2^121297620738 is an apocalyptic number.

121297620738 is an abundant number, since it is smaller than the sum of its proper divisors (178434024702).

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

121297620738 is a wasteful number, since it uses less digits than its factorization.

121297620738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4108231.

The product of its (nonzero) digits is 508032, while the sum is 48.

The spelling of 121297620738 in words is "one hundred twenty-one billion, two hundred ninety-seven million, six hundred twenty thousand, seven hundred thirty-eight".