31001320222113 has 16 divisors (see below), whose sum is σ = 44366111781696. Its totient is φ = 19185345630720.

The previous prime is 31001320222111. The next prime is 31001320222123. The reversal of 31001320222113 is 31122202310013.

It is not a de Polignac number, because 31001320222113 - 2¹ = 31001320222111 is a prime.

It is a super-2 number, since 2×31001320222113² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31001320222113.

It is not an unprimeable number, because it can be changed into a prime (31001320222111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4163482743 + ... + 4163490188.

It is an arithmetic number, because the mean of its divisors is an integer number (2772881986356).

Almost surely, 2^{31001320222113} is an apocalyptic number.

It is an amenable number.

31001320222113 is a deficient number, since it is larger than the sum of its proper divisors (13364791559583).

31001320222113 is a wasteful number, since it uses less digits than its factorization.

31001320222113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8326973024.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 31001320222113 its reverse (31122202310013), we get a palindrome (62123522532126).

The spelling of 31001320222113 in words is "thirty-one trillion, one billion, three hundred twenty million, two hundred twenty-two thousand, one hundred thirteen".