312401431402421 has 4 divisors (see below), whose sum is σ = 312485932740012. Its totient is φ = 312316930064832.

The previous prime is 312401431402369. The next prime is 312401431402427. The reversal of 312401431402421 is 124204134104213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 191876823545521 + 120524607856900 = 13851961^2 + 10978370^2 .

It is a cyclic number.

It is not a de Polignac number, because 312401431402421 - 2¹⁸ = 312401431140277 is a prime.

It is a super-2 number, since 2×312401431402421² (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 (312401431402427) 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, 42250663250 + ... + 42250670643.

It is an arithmetic number, because the mean of its divisors is an integer number (78121483185003).

Almost surely, 2^{312401431402421} is an apocalyptic number.

It is an amenable number.

312401431402421 is a deficient number, since it is larger than the sum of its proper divisors (84501337591).

312401431402421 is an equidigital number, since it uses as much as digits as its factorization.

312401431402421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84501337590.

The product of its (nonzero) digits is 18432, while the sum is 32.

Adding to 312401431402421 its reverse (124204134104213), we get a palindrome (436605565506634).

The spelling of 312401431402421 in words is "three hundred twelve trillion, four hundred one billion, four hundred thirty-one million, four hundred two thousand, four hundred twenty-one".