31340221421 has 4 divisors (see below), whose sum is σ = 31341699072. Its totient is φ = 31338743772.

The previous prime is 31340221417. The next prime is 31340221447. The reversal of 31340221421 is 12412204313.

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 31340221421 - 2² = 31340221417 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 (31340221921) 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, 706541 + ... + 749586.

It is an arithmetic number, because the mean of its divisors is an integer number (7835424768).

Almost surely, 2^31340221421 is an apocalyptic number.

It is an amenable number.

31340221421 is a deficient number, since it is larger than the sum of its proper divisors (1477651).

31340221421 is a wasteful number, since it uses less digits than its factorization.

31340221421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1477650.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 31340221421 its reverse (12412204313), we get a palindrome (43752425734).

The spelling of 31340221421 in words is "thirty-one billion, three hundred forty million, two hundred twenty-one thousand, four hundred twenty-one".