312220020031 has 4 divisors (see below), whose sum is σ = 312572016432. Its totient is φ = 311868023632.

The previous prime is 312220019983. The next prime is 312220020107. The reversal of 312220020031 is 130020022213.

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 312220020031 - 2¹⁵ = 312219987263 is a prime.

It is a super-2 number, since 2×312220020031² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312220019987 and 312220020014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312220020731) 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, 175996870 + ... + 175998643.

It is an arithmetic number, because the mean of its divisors is an integer number (78143004108).

Almost surely, 2^312220020031 is an apocalyptic number.

312220020031 is a deficient number, since it is larger than the sum of its proper divisors (351996401).

312220020031 is an equidigital number, since it uses as much as digits as its factorization.

312220020031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351996400.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 312220020031 its reverse (130020022213), we get a palindrome (442240042244).

The spelling of 312220020031 in words is "three hundred twelve billion, two hundred twenty million, twenty thousand, thirty-one".