12122012100 has 72 divisors (see below), whose sum is σ = 38261488608. Its totient is φ = 2938668800.

The previous prime is 12122012081. The next prime is 12122012107. The reversal of 12122012100 is 121022121.

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

It is not an unprimeable number, because it can be changed into a prime (12122012107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1833369 + ... + 1839968.

It is an arithmetic number, because the mean of its divisors is an integer number (531409564).

Almost surely, 2^12122012100 is an apocalyptic number.

12122012100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12122012100 is an abundant number, since it is smaller than the sum of its proper divisors (26139476508).

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

12122012100 is a wasteful number, since it uses less digits than its factorization.

12122012100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3673365 (or 3673358 counting only the distinct ones).

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

Adding to 12122012100 its reverse (121022121), we get a palindrome (12243034221).

The spelling of 12122012100 in words is "twelve billion, one hundred twenty-two million, twelve thousand, one hundred".