12122211100 has 36 divisors (see below), whose sum is σ = 26310284784. Its totient is φ = 4847946880.

The previous prime is 12122211089. The next prime is 12122211103. The reversal of 12122211100 is 111222121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122211103) 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, 762432 + ... + 778168.

It is an arithmetic number, because the mean of its divisors is an integer number (730841244).

Almost surely, 2^12122211100 is an apocalyptic number.

12122211100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12122211100 is an abundant number, since it is smaller than the sum of its proper divisors (14188073684).

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

12122211100 is a wasteful number, since it uses less digits than its factorization.

12122211100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23454 (or 23447 counting only the distinct ones).

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

Adding to 12122211100 its reverse (111222121), we get a palindrome (12233433221).

The spelling of 12122211100 in words is "twelve billion, one hundred twenty-two million, two hundred eleven thousand, one hundred".