312231122013331 has 4 divisors (see below), whose sum is σ = 312262039057000. Its totient is φ = 312200204969664.

The previous prime is 312231122013329. The next prime is 312231122013397. The reversal of 312231122013331 is 133310221132213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 312231122013331 - 2¹ = 312231122013329 is a prime.

It is a super-2 number, since 2×312231122013331² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 312231122013331.

It is not an unprimeable number, because it can be changed into a prime (312231122011331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15458506686 + ... + 15458526883.

It is an arithmetic number, because the mean of its divisors is an integer number (78065509764250).

Almost surely, 2^{312231122013331} is an apocalyptic number.

312231122013331 is a deficient number, since it is larger than the sum of its proper divisors (30917043669).

312231122013331 is a wasteful number, since it uses less digits than its factorization.

312231122013331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30917043668.

The product of its (nonzero) digits is 3888, while the sum is 28.

Adding to 312231122013331 its reverse (133310221132213), we get a palindrome (445541343145544).

The spelling of 312231122013331 in words is "three hundred twelve trillion, two hundred thirty-one billion, one hundred twenty-two million, thirteen thousand, three hundred thirty-one".