312131401413421 has 4 divisors (see below), whose sum is σ = 312131451409344. Its totient is φ = 312131351417500.

The previous prime is 312131401413383. The next prime is 312131401413427. The reversal of 312131401413421 is 124314104131213.

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 312131401413421 - 2²³ = 312131393024813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312131401413427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14028835 + ... + 28654336.

It is an arithmetic number, because the mean of its divisors is an integer number (78032862852336).

Almost surely, 2^{312131401413421} is an apocalyptic number.

It is an amenable number.

312131401413421 is a deficient number, since it is larger than the sum of its proper divisors (49995923).

312131401413421 is an equidigital number, since it uses as much as digits as its factorization.

312131401413421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49995922.

The product of its (nonzero) digits is 6912, while the sum is 31.

Adding to 312131401413421 its reverse (124314104131213), we get a palindrome (436445505544634).

The spelling of 312131401413421 in words is "three hundred twelve trillion, one hundred thirty-one billion, four hundred one million, four hundred thirteen thousand, four hundred twenty-one".