312212021031 has 24 divisors (see below), whose sum is σ = 471842163936. Its totient is φ = 198557916480.

The previous prime is 312212021003. The next prime is 312212021041. The reversal of 312212021031 is 130120212213.

It is not a de Polignac number, because 312212021031 - 2¹⁰ = 312212020007 is a prime.

It is a super-2 number, since 2×312212021031² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 312212020995 and 312212021013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312212021041) 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 23 ways as a sum of consecutive naturals, for example, 1944600 + ... + 2099021.

It is an arithmetic number, because the mean of its divisors is an integer number (19660090164).

Almost surely, 2^312212021031 is an apocalyptic number.

312212021031 is a deficient number, since it is larger than the sum of its proper divisors (159630142905).

312212021031 is a wasteful number, since it uses less digits than its factorization.

312212021031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4044023 (or 4044020 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 312212021031 its reverse (130120212213), we get a palindrome (442332233244).

The spelling of 312212021031 in words is "three hundred twelve billion, two hundred twelve million, twenty-one thousand, thirty-one".