12011021100 has 108 divisors (see below), whose sum is σ = 40543908496. Its totient is φ = 2956556160.

The previous prime is 12011021059. The next prime is 12011021137. The reversal of 12011021100 is 112011021.

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 35 ways as a sum of consecutive naturals, for example, 501592 + ... + 524991.

Almost surely, 2^12011021100 is an apocalyptic number.

12011021100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12011021100 is an abundant number, since it is smaller than the sum of its proper divisors (28532887396).

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

12011021100 is a wasteful number, since it uses less digits than its factorization.

12011021100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026616 (or 1026606 counting only the distinct ones).

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

Adding to 12011021100 its reverse (112011021), we get a palindrome (12123032121).

The spelling of 12011021100 in words is "twelve billion, eleven million, twenty-one thousand, one hundred".