312001023221031 has 32 divisors (see below), whose sum is σ = 460084614312960. Its totient is φ = 187179723247104.

The previous prime is 312001023221003. The next prime is 312001023221101. The reversal of 312001023221031 is 130122320100213.

It is not a de Polignac number, because 312001023221031 - 2¹⁸ = 312001022958887 is a prime.

It is a super-2 number, since 2×312001023221031² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 312001023220989 and 312001023221007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312001023221131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1023896395 + ... + 1024201068.

It is an arithmetic number, because the mean of its divisors is an integer number (14377644197280).

Almost surely, 2^{312001023221031} is an apocalyptic number.

312001023221031 is a deficient number, since it is larger than the sum of its proper divisors (148083591091929).

312001023221031 is a wasteful number, since it uses less digits than its factorization.

312001023221031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2048097615.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 312001023221031 its reverse (130122320100213), we get a palindrome (442123343321244).

The spelling of 312001023221031 in words is "three hundred twelve trillion, one billion, twenty-three million, two hundred twenty-one thousand, thirty-one".