31122223013 has 16 divisors (see below), whose sum is σ = 37172545536. Its totient is φ = 25476588720.

The previous prime is 31122223009. The next prime is 31122223019. The reversal of 31122223013 is 31032222113.

It is a cyclic number.

It is not a de Polignac number, because 31122223013 - 2² = 31122223009 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31122223019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46793 + ... + 253838.

It is an arithmetic number, because the mean of its divisors is an integer number (2323284096).

Almost surely, 2^31122223013 is an apocalyptic number.

It is an amenable number.

31122223013 is a deficient number, since it is larger than the sum of its proper divisors (6050322523).

31122223013 is a wasteful number, since it uses less digits than its factorization.

31122223013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301304.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31122223013 its reverse (31032222113), we get a palindrome (62154445126).

The spelling of 31122223013 in words is "thirty-one billion, one hundred twenty-two million, two hundred twenty-three thousand, thirteen".