312113202421 has 4 divisors (see below), whose sum is σ = 312114562912. Its totient is φ = 312111841932.

The previous prime is 312113202403. The next prime is 312113202463. The reversal of 312113202421 is 124202311213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 312113202421 - 2¹⁹ = 312112678133 is a prime.

It is a super-2 number, since 2×312113202421² (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 = 312113202392 and 312113202401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312113212421) 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 3 ways as a sum of consecutive naturals, for example, 242025 + ... + 826318.

It is an arithmetic number, because the mean of its divisors is an integer number (78028640728).

Almost surely, 2^312113202421 is an apocalyptic number.

It is an amenable number.

312113202421 is a deficient number, since it is larger than the sum of its proper divisors (1360491).

312113202421 is a wasteful number, since it uses less digits than its factorization.

312113202421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360490.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 312113202421 its reverse (124202311213), we get a palindrome (436315513634).

The spelling of 312113202421 in words is "three hundred twelve billion, one hundred thirteen million, two hundred two thousand, four hundred twenty-one".