31133320113 has 16 divisors (see below), whose sum is σ = 47513042816. Its totient is φ = 17763546240.

The previous prime is 31133320103. The next prime is 31133320121. The reversal of 31133320113 is 31102333113.

It is not a de Polignac number, because 31133320113 - 2¹⁰ = 31133319089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31133320113.

It is not an unprimeable number, because it can be changed into a prime (31133320103) 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, 1107556 + ... + 1135317.

It is an arithmetic number, because the mean of its divisors is an integer number (2969565176).

Almost surely, 2^31133320113 is an apocalyptic number.

It is an amenable number.

31133320113 is a deficient number, since it is larger than the sum of its proper divisors (16379722703).

31133320113 is a wasteful number, since it uses less digits than its factorization.

31133320113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2243544.

The product of its (nonzero) digits is 486, while the sum is 21.

Adding to 31133320113 its reverse (31102333113), we get a palindrome (62235653226).

The spelling of 31133320113 in words is "thirty-one billion, one hundred thirty-three million, three hundred twenty thousand, one hundred thirteen".