12001112100 has 54 divisors (see below), whose sum is σ = 37616821970. Its totient is φ = 3200296320.

The previous prime is 12001112099. The next prime is 12001112153. The reversal of 12001112100 is 121110021.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1986306624 + 10014805476 = 44568^2 + 100074^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6666385 + ... + 6668184.

Almost surely, 2^12001112100 is an apocalyptic number.

12001112100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001112100 is an abundant number, since it is smaller than the sum of its proper divisors (25615709870).

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

12001112100 is a wasteful number, since it uses less digits than its factorization.

12001112100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13334589 (or 13334579 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 12001112100 its reverse (121110021), we get a palindrome (12122222121).

The spelling of 12001112100 in words is "twelve billion, one million, one hundred twelve thousand, one hundred".