12122112100 has 72 divisors (see below), whose sum is σ = 31645127360. Its totient is φ = 3937403520.

The previous prime is 12122112061. The next prime is 12122112131. The reversal of 12122112100 is 121122121.

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, 442419 + ... + 469018.

Almost surely, 2^12122112100 is an apocalyptic number.

12122112100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12122112100 is an abundant number, since it is smaller than the sum of its proper divisors (19523015260).

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

12122112100 is a wasteful number, since it uses less digits than its factorization.

12122112100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911477 (or 911470 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12122112100 its reverse (121122121), we get a palindrome (12243234221).

The spelling of 12122112100 in words is "twelve billion, one hundred twenty-two million, one hundred twelve thousand, one hundred".