20202100201221 has 16 divisors (see below), whose sum is σ = 27024303432000. Its totient is φ = 13424013283968.

The previous prime is 20202100201219. The next prime is 20202100201247. The reversal of 20202100201221 is 12210200120202.

It is not a de Polignac number, because 20202100201221 - 2¹ = 20202100201219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20202100201221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202100201021) 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, 1348816 + ... + 6497961.

It is an arithmetic number, because the mean of its divisors is an integer number (1689018964500).

Almost surely, 2^{20202100201221} is an apocalyptic number.

It is an amenable number.

20202100201221 is a deficient number, since it is larger than the sum of its proper divisors (6822203230779).

20202100201221 is a wasteful number, since it uses less digits than its factorization.

20202100201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7849588.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20202100201221 its reverse (12210200120202), we get a palindrome (32412300321423).

The spelling of 20202100201221 in words is "twenty trillion, two hundred two billion, one hundred million, two hundred one thousand, two hundred twenty-one".