312213133021 has 32 divisors (see below), whose sum is σ = 351995051520. Its totient is φ = 275175014400.

The previous prime is 312213132967. The next prime is 312213133031. The reversal of 312213133021 is 120331312213.

It is a cyclic number.

It is not a de Polignac number, because 312213133021 - 2⁷ = 312213132893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312213132983 and 312213133001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312213133031) 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, 27596956 + ... + 27608266.

It is an arithmetic number, because the mean of its divisors is an integer number (10999845360).

Almost surely, 2^312213133021 is an apocalyptic number.

It is an amenable number.

312213133021 is a deficient number, since it is larger than the sum of its proper divisors (39781918499).

312213133021 is a wasteful number, since it uses less digits than its factorization.

312213133021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12325.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 312213133021 its reverse (120331312213), we get a palindrome (432544445234).

The spelling of 312213133021 in words is "three hundred twelve billion, two hundred thirteen million, one hundred thirty-three thousand, twenty-one".