642121123326316 has 12 divisors (see below), whose sum is σ = 1128619004974720. Its totient is φ = 319658550476400.

The previous prime is 642121123326271. The next prime is 642121123326329. The reversal of 642121123326316 is 613623321121246.

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, 350502795660 + ... + 350502797491.

Almost surely, 2^{642121123326316} is an apocalyptic number.

It is an amenable number.

642121123326316 is a deficient number, since it is larger than the sum of its proper divisors (486497881648404).

642121123326316 is a wasteful number, since it uses less digits than its factorization.

642121123326316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701005593384 (or 701005593382 counting only the distinct ones).

The product of its digits is 373248, while the sum is 43.

The spelling of 642121123326316 in words is "six hundred forty-two trillion, one hundred twenty-one billion, one hundred twenty-three million, three hundred twenty-six thousand, three hundred sixteen".