20113100031011 has 12 divisors (see below), whose sum is σ = 21779804940552. Its totient is φ = 18565485883776.

The previous prime is 20113100030963. The next prime is 20113100031043. The reversal of 20113100031011 is 11013000131102.

It is a happy number.

It is not a de Polignac number, because 20113100031011 - 2³⁸ = 19838222124067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20113100031091) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5603420 + ... + 8463126.

It is an arithmetic number, because the mean of its divisors is an integer number (1814983745046).

Almost surely, 2^{20113100031011} is an apocalyptic number.

20113100031011 is a deficient number, since it is larger than the sum of its proper divisors (1666704909541).

20113100031011 is a wasteful number, since it uses less digits than its factorization.

20113100031011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2901350 (or 2901337 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 20113100031011 its reverse (11013000131102), we get a palindrome (31126100162113).

The spelling of 20113100031011 in words is "twenty trillion, one hundred thirteen billion, one hundred million, thirty-one thousand, eleven".