12020221100 has 36 divisors (see below), whose sum is σ = 26178105744. Its totient is φ = 4790719680.

The previous prime is 12020221097. The next prime is 12020221111. The reversal of 12020221100 is 112202021.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 189272 + ... + 244671.

It is an arithmetic number, because the mean of its divisors is an integer number (727169604).

Almost surely, 2^12020221100 is an apocalyptic number.

12020221100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12020221100 is an abundant number, since it is smaller than the sum of its proper divisors (14157884644).

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

12020221100 is a wasteful number, since it uses less digits than its factorization.

12020221100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434234 (or 434227 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 12020221100 its reverse (112202021), we get a palindrome (12132423121).

The spelling of 12020221100 in words is "twelve billion, twenty million, two hundred twenty-one thousand, one hundred".