20012131100 has 36 divisors (see below), whose sum is σ = 46766814024. Its totient is φ = 7389094080.

The previous prime is 20012131093. The next prime is 20012131109. The reversal of 20012131100 is 113121002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012131109) 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, 7695674 + ... + 7698273.

Almost surely, 2^20012131100 is an apocalyptic number.

20012131100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012131100 is an abundant number, since it is smaller than the sum of its proper divisors (26754682924).

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

20012131100 is a wasteful number, since it uses less digits than its factorization.

20012131100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15393974 (or 15393967 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 20012131100 its reverse (113121002), we get a palindrome (20125252102).

The spelling of 20012131100 in words is "twenty billion, twelve million, one hundred thirty-one thousand, one hundred".