20202100333021 has 4 divisors (see below), whose sum is σ = 20233616870844. Its totient is φ = 20170583795200.

The previous prime is 20202100333007. The next prime is 20202100333033. The reversal of 20202100333021 is 12033300120202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14259792173796 + 5942308159225 = 3776214^2 + 2437685^2 .

It is a cyclic number.

It is not a de Polignac number, because 20202100333021 - 2⁷ = 20202100332893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20202100333021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202100333321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15758267950 + ... + 15758269231.

It is an arithmetic number, because the mean of its divisors is an integer number (5058404217711).

Almost surely, 2^{20202100333021} is an apocalyptic number.

It is an amenable number.

20202100333021 is a deficient number, since it is larger than the sum of its proper divisors (31516537823).

20202100333021 is an equidigital number, since it uses as much as digits as its factorization.

20202100333021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31516537822.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20202100333021 its reverse (12033300120202), we get a palindrome (32235400453223).

The spelling of 20202100333021 in words is "twenty trillion, two hundred two billion, one hundred million, three hundred thirty-three thousand, twenty-one".