31012000011 has 16 divisors (see below), whose sum is σ = 45949401120. Its totient is φ = 20672102880.

The previous prime is 31011999979. The next prime is 31012000027. The reversal of 31012000011 is 11000021013.

It is not a de Polignac number, because 31012000011 - 2⁵ = 31011999979 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 31011999957 and 31012000002.

It is not an unprimeable number, because it can be changed into a prime (31012000111) 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 15 ways as a sum of consecutive naturals, for example, 164761 + ... + 298613.

It is an arithmetic number, because the mean of its divisors is an integer number (2871837570).

Almost surely, 2^31012000011 is an apocalyptic number.

31012000011 is a deficient number, since it is larger than the sum of its proper divisors (14937401109).

31012000011 is a wasteful number, since it uses less digits than its factorization.

31012000011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142443 (or 142437 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

Adding to 31012000011 its reverse (11000021013), we get a palindrome (42012021024).

The spelling of 31012000011 in words is "thirty-one billion, twelve million, eleven", and thus it is an aban number and an uban number.