312221321113 has 16 divisors (see below), whose sum is σ = 336975674112. Its totient is φ = 287572680000.

The previous prime is 312221321107. The next prime is 312221321123. The reversal of 312221321113 is 311123122213.

It is a cyclic number.

It is not a de Polignac number, because 312221321113 - 2²¹ = 312219223961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312221321123) 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, 27500388 + ... + 27511738.

It is an arithmetic number, because the mean of its divisors is an integer number (21060979632).

Almost surely, 2^312221321113 is an apocalyptic number.

It is an amenable number.

312221321113 is a deficient number, since it is larger than the sum of its proper divisors (24754352999).

312221321113 is a wasteful number, since it uses less digits than its factorization.

312221321113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15816.

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

Adding to 312221321113 its reverse (311123122213), we get a palindrome (623344443326).

The spelling of 312221321113 in words is "three hundred twelve billion, two hundred twenty-one million, three hundred twenty-one thousand, one hundred thirteen".