31320202113 has 24 divisors (see below), whose sum is σ = 47451600768. Its totient is φ = 19883545632.

The previous prime is 31320202079. The next prime is 31320202153. The reversal of 31320202113 is 31120202313.

31320202113 is a `hidden beast` number, since 31 + 320 + 202 + 113 = 666.

It is not a de Polignac number, because 31320202113 - 2¹⁶ = 31320136577 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31320202153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 984931 + ... + 1016232.

It is an arithmetic number, because the mean of its divisors is an integer number (1977150032).

Almost surely, 2^31320202113 is an apocalyptic number.

It is an amenable number.

31320202113 is a deficient number, since it is larger than the sum of its proper divisors (16131398655).

31320202113 is a wasteful number, since it uses less digits than its factorization.

31320202113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2001253 (or 2001250 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31320202113 its reverse (31120202313), we get a palindrome (62440404426).

The spelling of 31320202113 in words is "thirty-one billion, three hundred twenty million, two hundred two thousand, one hundred thirteen".