31001111013 has 4 divisors (see below), whose sum is σ = 41334814688. Its totient is φ = 20667407340.

The previous prime is 31001110997. The next prime is 31001111023. The reversal of 31001111013 is 31011110013.

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 not a de Polignac number, because 31001111013 - 2⁴ = 31001110997 is a prime.

It is a super-2 number, since 2×31001111013² (a number of 22 digits) contains 22 as substring.

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 31001111013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31001111023) 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 3 ways as a sum of consecutive naturals, for example, 5166851833 + ... + 5166851838.

It is an arithmetic number, because the mean of its divisors is an integer number (10333703672).

Almost surely, 2^31001111013 is an apocalyptic number.

It is an amenable number.

31001111013 is a deficient number, since it is larger than the sum of its proper divisors (10333703675).

31001111013 is a wasteful number, since it uses less digits than its factorization.

31001111013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10333703674.

The product of its (nonzero) digits is 9, while the sum is 12.

Adding to 31001111013 its reverse (31011110013), we get a palindrome (62012221026).

The spelling of 31001111013 in words is "thirty-one billion, one million, one hundred eleven thousand, thirteen".