31002112009 has 4 divisors (see below), whose sum is σ = 33820485840. Its totient is φ = 28183738180.

The previous prime is 31002111989. The next prime is 31002112021. The reversal of 31002112009 is 90021120013.

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.

It is a cyclic number.

It is not a de Polignac number, because 31002112009 - 2¹³ = 31002103817 is a prime.

It is a super-2 number, since 2×31002112009² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31002112049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1409186899 + ... + 1409186920.

It is an arithmetic number, because the mean of its divisors is an integer number (8455121460).

Almost surely, 2^31002112009 is an apocalyptic number.

It is an amenable number.

31002112009 is a deficient number, since it is larger than the sum of its proper divisors (2818373831).

31002112009 is a wasteful number, since it uses less digits than its factorization.

31002112009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2818373830.

The product of its (nonzero) digits is 108, while the sum is 19.

The spelling of 31002112009 in words is "thirty-one billion, two million, one hundred twelve thousand, nine".