20102111122011 has 16 divisors (see below), whose sum is σ = 26823008018688. Its totient is φ = 13391313012000.

The previous prime is 20102111122007. The next prime is 20102111122033. The reversal of 20102111122011 is 11022111120102.

It is a happy number.

It is not a de Polignac number, because 20102111122011 - 2² = 20102111122007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20102111122211) 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 15 ways as a sum of consecutive naturals, for example, 37050036 + ... + 37588686.

It is an arithmetic number, because the mean of its divisors is an integer number (1676438001168).

Almost surely, 2^{20102111122011} is an apocalyptic number.

20102111122011 is a deficient number, since it is larger than the sum of its proper divisors (6720896896677).

20102111122011 is a wasteful number, since it uses less digits than its factorization.

20102111122011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548002.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20102111122011 its reverse (11022111120102), we get a palindrome (31124222242113).

The spelling of 20102111122011 in words is "twenty trillion, one hundred two billion, one hundred eleven million, one hundred twenty-two thousand, eleven".