20111204100 has 72 divisors (see below), whose sum is σ = 62664461440. Its totient is φ = 4950449280.

The previous prime is 20111204083. The next prime is 20111204123. The reversal of 20111204100 is 140211102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 2574460 + ... + 2582259.

Almost surely, 2^20111204100 is an apocalyptic number.

20111204100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111204100 is an abundant number, since it is smaller than the sum of its proper divisors (42553257340).

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

20111204100 is a wasteful number, since it uses less digits than its factorization.

20111204100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5156749 (or 5156742 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20111204100 its reverse (140211102), we get a palindrome (20251415202).

The spelling of 20111204100 in words is "twenty billion, one hundred eleven million, two hundred four thousand, one hundred".