31422321213 has 4 divisors (see below), whose sum is σ = 41896428288. Its totient is φ = 20948214140.

The previous prime is 31422321101. The next prime is 31422321241. The reversal of 31422321213 is 31212322413.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31212322413 = 3 ⋅10404107471.

It is a cyclic number.

It is not a de Polignac number, because 31422321213 - 2⁹ = 31422320701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31422321253) 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, 5237053533 + ... + 5237053538.

It is an arithmetic number, because the mean of its divisors is an integer number (10474107072).

Almost surely, 2^31422321213 is an apocalyptic number.

It is an amenable number.

31422321213 is a deficient number, since it is larger than the sum of its proper divisors (10474107075).

31422321213 is a wasteful number, since it uses less digits than its factorization.

31422321213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10474107074.

The product of its digits is 1728, while the sum is 24.

Adding to 31422321213 its reverse (31212322413), we get a palindrome (62634643626).

The spelling of 31422321213 in words is "thirty-one billion, four hundred twenty-two million, three hundred twenty-one thousand, two hundred thirteen".