12122021100 has 72 divisors (see below), whose sum is σ = 40083490048. Its totient is φ = 2770747200.

The previous prime is 12122021069. The next prime is 12122021113. The reversal of 12122021100 is 112022121.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2884096 + ... + 2888295.

Almost surely, 2^12122021100 is an apocalyptic number.

12122021100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12122021100 is an abundant number, since it is smaller than the sum of its proper divisors (27961468948).

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

12122021100 is a wasteful number, since it uses less digits than its factorization.

12122021100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5772415 (or 5772408 counting only the distinct ones).

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

Adding to 12122021100 its reverse (112022121), we get a palindrome (12234043221).

It can be divided in two parts, 12122021 and 100, that added together give a palindrome (12122121).

The spelling of 12122021100 in words is "twelve billion, one hundred twenty-two million, twenty-one thousand, one hundred".