3121321131938 has 8 divisors (see below), whose sum is σ = 4770320975388. Its totient is φ = 1531214140144.

The previous prime is 3121321131937. The next prime is 3121321131949. The reversal of 3121321131938 is 8391311231213.

It can be written as a sum of positive squares in 2 ways, for example, as 3086216238169 + 35104893769 = 1756763^2 + 187363^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (3121321131937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14723212781 + ... + 14723212992.

Almost surely, 2^{3121321131938} is an apocalyptic number.

3121321131938 is a deficient number, since it is larger than the sum of its proper divisors (1648999843450).

3121321131938 is a wasteful number, since it uses less digits than its factorization.

3121321131938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29446425828.

The product of its digits is 23328, while the sum is 38.

The spelling of 3121321131938 in words is "three trillion, one hundred twenty-one billion, three hundred twenty-one million, one hundred thirty-one thousand, nine hundred thirty-eight".