312221213201131 has 12 divisors (see below), whose sum is σ = 344639184796816. Its totient is φ = 281174826127680.

The previous prime is 312221213201129. The next prime is 312221213201173. The reversal of 312221213201131 is 131102312122213.

It is not a de Polignac number, because 312221213201131 - 2¹ = 312221213201129 is a prime.

It is a super-2 number, since 2×312221213201131² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 312221213201096 and 312221213201105.

It is not an unprimeable number, because it can be changed into a prime (312221213201101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7143647511 + ... + 7143691216.

Almost surely, 2^{312221213201131} is an apocalyptic number.

312221213201131 is a deficient number, since it is larger than the sum of its proper divisors (32417971595685).

312221213201131 is a wasteful number, since it uses less digits than its factorization.

312221213201131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14287338822 (or 14287338781 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 312221213201131 its reverse (131102312122213), we get a palindrome (443323525323344).

The spelling of 312221213201131 in words is "three hundred twelve trillion, two hundred twenty-one billion, two hundred thirteen million, two hundred one thousand, one hundred thirty-one".