312202240431421 has 4 divisors (see below), whose sum is σ = 318844841291712. Its totient is φ = 305559639571132.

The previous prime is 312202240431413. The next prime is 312202240431449. The reversal of 312202240431421 is 124134042202213.

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 312202240431421 - 2³ = 312202240431413 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 (312202240431461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3321300430075 + ... + 3321300430168.

It is an arithmetic number, because the mean of its divisors is an integer number (79711210322928).

Almost surely, 2^{312202240431421} is an apocalyptic number.

It is an amenable number.

312202240431421 is a deficient number, since it is larger than the sum of its proper divisors (6642600860291).

312202240431421 is an equidigital number, since it uses as much as digits as its factorization.

312202240431421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6642600860290.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 312202240431421 its reverse (124134042202213), we get a palindrome (436336282633634).

The spelling of 312202240431421 in words is "three hundred twelve trillion, two hundred two billion, two hundred forty million, four hundred thirty-one thousand, four hundred twenty-one".