12011022100 has 108 divisors (see below), whose sum is σ = 33075695520. Its totient is φ = 3743678400.

The previous prime is 12011022059. The next prime is 12011022113. The reversal of 12011022100 is 122011021.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

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, 57520 + ... + 165319.

It is an arithmetic number, because the mean of its divisors is an integer number (306256440).

Almost surely, 2^12011022100 is an apocalyptic number.

12011022100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12011022100 is an abundant number, since it is smaller than the sum of its proper divisors (21064673420).

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

12011022100 is a wasteful number, since it uses less digits than its factorization.

12011022100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222878 (or 222864 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 12011022100 its reverse (122011021), we get a palindrome (12133033121).

The spelling of 12011022100 in words is "twelve billion, eleven million, twenty-two thousand, one hundred".