3121223021131 has 16 divisors (see below), whose sum is σ = 3409059398400. Its totient is φ = 2846358900000.

The previous prime is 3121223021069. The next prime is 3121223021149. The reversal of 3121223021131 is 1311203221213.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3121223021131 is a prime.

It is a super-2 number, since 2×3121223021131² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3121223024131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8374495 + ... + 8739256.

It is an arithmetic number, because the mean of its divisors is an integer number (213066212400).

Almost surely, 2^{3121223021131} is an apocalyptic number.

3121223021131 is a deficient number, since it is larger than the sum of its proper divisors (287836377269).

3121223021131 is a wasteful number, since it uses less digits than its factorization.

3121223021131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17114130.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 3121223021131 its reverse (1311203221213), we get a palindrome (4432426242344).

The spelling of 3121223021131 in words is "three trillion, one hundred twenty-one billion, two hundred twenty-three million, twenty-one thousand, one hundred thirty-one".