3121699068838 has 32 divisors (see below), whose sum is σ = 5497347240000. Its totient is φ = 1328891985792.

The previous prime is 3121699068821. The next prime is 3121699068841. The reversal of 3121699068838 is 8388609961213.

It is a self number, because there is not a number n which added to its sum of digits gives 3121699068838.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15168195 + ... + 15372622.

It is an arithmetic number, because the mean of its divisors is an integer number (171792101250).

Almost surely, 2^{3121699068838} is an apocalyptic number.

3121699068838 is a deficient number, since it is larger than the sum of its proper divisors (2375648171162).

3121699068838 is a wasteful number, since it uses less digits than its factorization.

3121699068838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30540989 (or 30540975 counting only the distinct ones).

The product of its (nonzero) digits is 26873856, while the sum is 64.

The spelling of 3121699068838 in words is "three trillion, one hundred twenty-one billion, six hundred ninety-nine million, sixty-eight thousand, eight hundred thirty-eight".