12100001021100 has 54 divisors (see below), whose sum is σ = 37926780981180. Its totient is φ = 3226666938720.

The previous prime is 12100001021089. The next prime is 12100001021131. The reversal of 12100001021100 is 112010000121.

It is a happy number.

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, 6722221890 + ... + 6722223689.

Almost surely, 2^{12100001021100} is an apocalyptic number.

12100001021100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12100001021100 is an abundant number, since it is smaller than the sum of its proper divisors (25826779960080).

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

12100001021100 is a wasteful number, since it uses less digits than its factorization.

12100001021100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13444445599 (or 13444445589 counting only the distinct ones).

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

Adding to 12100001021100 its reverse (112010000121), we get a palindrome (12212011021221).

The spelling of 12100001021100 in words is "twelve trillion, one hundred billion, one million, twenty-one thousand, one hundred".