31221241334131 has 16 divisors (see below), whose sum is σ = 32598966816000. Its totient is φ = 29845209306528.

The previous prime is 31221241334089. The next prime is 31221241334159. The reversal of 31221241334131 is 13143314212213.

It is not a de Polignac number, because 31221241334131 - 2²³ = 31221232945523 is a prime.

It is a super-2 number, since 2×31221241334131² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31221241334093 and 31221241334102.

It is not an unprimeable number, because it can be changed into a prime (31221241334531) 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, 476343760 + ... + 476409298.

It is an arithmetic number, because the mean of its divisors is an integer number (2037435426000).

Almost surely, 2^{31221241334131} is an apocalyptic number.

31221241334131 is a deficient number, since it is larger than the sum of its proper divisors (1377725481869).

31221241334131 is a wasteful number, since it uses less digits than its factorization.

31221241334131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78138.

The product of its digits is 10368, while the sum is 31.

Adding to 31221241334131 its reverse (13143314212213), we get a palindrome (44364555546344).

The spelling of 31221241334131 in words is "thirty-one trillion, two hundred twenty-one billion, two hundred forty-one million, three hundred thirty-four thousand, one hundred thirty-one".