31011112002011 has 4 divisors (see below), whose sum is σ = 31011362888712. Its totient is φ = 31010861115312.

The previous prime is 31011112001993. The next prime is 31011112002041. The reversal of 31011112002011 is 11020021111013.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31011112002011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31011112002041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125257850 + ... + 125505183.

It is an arithmetic number, because the mean of its divisors is an integer number (7752840722178).

Almost surely, 2^{31011112002011} is an apocalyptic number.

31011112002011 is a deficient number, since it is larger than the sum of its proper divisors (250886701).

31011112002011 is a wasteful number, since it uses less digits than its factorization.

31011112002011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250886700.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 31011112002011 its reverse (11020021111013), we get a palindrome (42031133113024).

The spelling of 31011112002011 in words is "thirty-one trillion, eleven billion, one hundred twelve million, two thousand, eleven".