12100201221021 has 16 divisors (see below), whose sum is σ = 17544329913024. Its totient is φ = 7387086276864.

The previous prime is 12100201221011. The next prime is 12100201221047. The reversal of 12100201221021 is 12012210200121.

It is not a de Polignac number, because 12100201221021 - 2⁷ = 12100201220893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100201221001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3206198755 + ... + 3206202528.

It is an arithmetic number, because the mean of its divisors is an integer number (1096520619564).

Almost surely, 2^{12100201221021} is an apocalyptic number.

It is an amenable number.

12100201221021 is a deficient number, since it is larger than the sum of its proper divisors (5444128692003).

12100201221021 is a wasteful number, since it uses less digits than its factorization.

12100201221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6412401340.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12100201221021 its reverse (12012210200121), we get a palindrome (24112411421142).

The spelling of 12100201221021 in words is "twelve trillion, one hundred billion, two hundred one million, two hundred twenty-one thousand, twenty-one".