312011424323221 has 12 divisors (see below), whose sum is σ = 363002398551360. Its totient is φ = 267401275847160.

The previous prime is 312011424323191. The next prime is 312011424323243. The reversal of 312011424323221 is 122323424110213.

It is not a de Polignac number, because 312011424323221 - 2¹⁵ = 312011424290453 is a prime.

It is a super-2 number, since 2×312011424323221² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312011427323221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 441165181 + ... + 441871858.

It is an arithmetic number, because the mean of its divisors is an integer number (30250199879280).

Almost surely, 2^{312011424323221} is an apocalyptic number.

It is an amenable number.

312011424323221 is a deficient number, since it is larger than the sum of its proper divisors (50990974228139).

312011424323221 is an equidigital number, since it uses as much as digits as its factorization.

312011424323221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883044264 (or 883044257 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 312011424323221 its reverse (122323424110213), we get a palindrome (434334848433434).

The spelling of 312011424323221 in words is "three hundred twelve trillion, eleven billion, four hundred twenty-four million, three hundred twenty-three thousand, two hundred twenty-one".