31213122414421 has 4 divisors (see below), whose sum is σ = 31369972276000. Its totient is φ = 31056272552844.

The previous prime is 31213122414373. The next prime is 31213122414433. The reversal of 31213122414421 is 12441422131213.

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 31213122414421 - 2¹⁵ = 31213122381653 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 (31213122414451) 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, 78424930491 + ... + 78424930888.

It is an arithmetic number, because the mean of its divisors is an integer number (7842493069000).

Almost surely, 2^{31213122414421} is an apocalyptic number.

It is an amenable number.

31213122414421 is a deficient number, since it is larger than the sum of its proper divisors (156849861579).

31213122414421 is a wasteful number, since it uses less digits than its factorization.

31213122414421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156849861578.

The product of its digits is 9216, while the sum is 31.

Adding to 31213122414421 its reverse (12441422131213), we get a palindrome (43654544545634).

The spelling of 31213122414421 in words is "thirty-one trillion, two hundred thirteen billion, one hundred twenty-two million, four hundred fourteen thousand, four hundred twenty-one".