12102121100 has 18 divisors (see below), whose sum is σ = 26261603004. Its totient is φ = 4840848400.

The previous prime is 12102121099. The next prime is 12102121127. The reversal of 12102121100 is 112120121.

It is a super-2 number, since 2×12102121100² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 60510506 + ... + 60510705.

Almost surely, 2^12102121100 is an apocalyptic number.

12102121100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12102121100 is an abundant number, since it is smaller than the sum of its proper divisors (14159481904).

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

12102121100 is a wasteful number, since it uses less digits than its factorization.

12102121100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121021225 (or 121021218 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 12102121100 its reverse (112120121), we get a palindrome (12214241221).

The spelling of 12102121100 in words is "twelve billion, one hundred two million, one hundred twenty-one thousand, one hundred".