12012112100 has 18 divisors (see below), whose sum is σ = 26066283474. Its totient is φ = 4804844800.

The previous prime is 12012112087. The next prime is 12012112117. The reversal of 12012112100 is 121121021.

It can be written as a sum of positive squares in 3 ways, for example, as 1705636 + 12010406464 = 1306^2 + 109592^2 .

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, 60060461 + ... + 60060660.

Almost surely, 2^12012112100 is an apocalyptic number.

12012112100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12012112100 is an abundant number, since it is smaller than the sum of its proper divisors (14054171374).

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

12012112100 is a wasteful number, since it uses less digits than its factorization.

12012112100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120121135 (or 120121128 counting only the distinct ones).

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

Adding to 12012112100 its reverse (121121021), we get a palindrome (12133233121).

The spelling of 12012112100 in words is "twelve billion, twelve million, one hundred twelve thousand, one hundred".