20100111100 has 36 divisors (see below), whose sum is σ = 43623395424. Its totient is φ = 8038910080.

The previous prime is 20100111071. The next prime is 20100111151. The reversal of 20100111100 is 111100102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1384077 + ... + 1398523.

It is an arithmetic number, because the mean of its divisors is an integer number (1211760984).

Almost surely, 2^20100111100 is an apocalyptic number.

20100111100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20100111100 is an abundant number, since it is smaller than the sum of its proper divisors (23523284324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20100111100 is a wasteful number, since it uses less digits than its factorization.

20100111100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28374 (or 28367 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 20100111100 its reverse (111100102), we get a palindrome (20211211202).

The spelling of 20100111100 in words is "twenty billion, one hundred million, one hundred eleven thousand, one hundred".