12021101100 has 54 divisors (see below), whose sum is σ = 37679476380. Its totient is φ = 3205626720.

The previous prime is 12021101023. The next prime is 12021101101. The reversal of 12021101100 is 110112021.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (12021101101) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6677490 + ... + 6679289.

Almost surely, 2^12021101100 is an apocalyptic number.

12021101100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021101100 is an abundant number, since it is smaller than the sum of its proper divisors (25658375280).

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

12021101100 is a wasteful number, since it uses less digits than its factorization.

12021101100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13356799 (or 13356789 counting only the distinct ones).

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

Adding to 12021101100 its reverse (110112021), we get a palindrome (12131213121).

The spelling of 12021101100 in words is "twelve billion, twenty-one million, one hundred one thousand, one hundred".