312101221131 has 12 divisors (see below), whose sum is σ = 515214714352. Its totient is φ = 178343554896.

The previous prime is 312101221093. The next prime is 312101221181. The reversal of 312101221131 is 131122101213.

312101221131 is a `hidden beast` number, since 312 + 1 + 0 + 1 + 221 + 131 = 666.

It is not a de Polignac number, because 312101221131 - 2⁶ = 312101221067 is a prime.

It is a super-2 number, since 2×312101221131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312101221181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2476993756 + ... + 2476993881.

Almost surely, 2^312101221131 is an apocalyptic number.

312101221131 is a deficient number, since it is larger than the sum of its proper divisors (203113493221).

312101221131 is a wasteful number, since it uses less digits than its factorization.

312101221131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4953987650 (or 4953987647 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 312101221131 its reverse (131122101213), we get a palindrome (443223322344).

The spelling of 312101221131 in words is "three hundred twelve billion, one hundred one million, two hundred twenty-one thousand, one hundred thirty-one".