312332021221 has 16 divisors (see below), whose sum is σ = 352092722688. Its totient is φ = 274485369600.

The previous prime is 312332021207. The next prime is 312332021237. The reversal of 312332021221 is 122120233213.

It is a cyclic number.

It is not a de Polignac number, because 312332021221 - 2¹¹ = 312332019173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312332021192 and 312332021201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312332021021) 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 15 ways as a sum of consecutive naturals, for example, 169240 + ... + 808273.

It is an arithmetic number, because the mean of its divisors is an integer number (22005795168).

Almost surely, 2^312332021221 is an apocalyptic number.

312332021221 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

312332021221 is a deficient number, since it is larger than the sum of its proper divisors (39760701467).

312332021221 is a wasteful number, since it uses less digits than its factorization.

312332021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978492.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 312332021221 its reverse (122120233213), we get a palindrome (434452254434).

The spelling of 312332021221 in words is "three hundred twelve billion, three hundred thirty-two million, twenty-one thousand, two hundred twenty-one".