312213022112421 has 16 divisors (see below), whose sum is σ = 462610525429120. Its totient is φ = 208109293040160.

The previous prime is 312213022112293. The next prime is 312213022112491. The reversal of 312213022112421 is 124211220312213.

312213022112421 is a `hidden beast` number, since 3 + 1 + 2 + 2 + 1 + 3 + 0 + 221 + 12 + 421 = 666.

It is not a de Polignac number, because 312213022112421 - 2⁷ = 312213022112293 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312213022112491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 908761225 + ... + 909104718.

It is an arithmetic number, because the mean of its divisors is an integer number (28913157839320).

Almost surely, 2^{312213022112421} is an apocalyptic number.

It is an amenable number.

312213022112421 is a deficient number, since it is larger than the sum of its proper divisors (150397503316699).

312213022112421 is a wasteful number, since it uses less digits than its factorization.

312213022112421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1817872313 (or 1817872307 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

Adding to 312213022112421 its reverse (124211220312213), we get a palindrome (436424242424634).

The spelling of 312213022112421 in words is "three hundred twelve trillion, two hundred thirteen billion, twenty-two million, one hundred twelve thousand, four hundred twenty-one".