20202101202021 has 4 divisors (see below), whose sum is σ = 26936134936032. Its totient is φ = 13468067468012.

The previous prime is 20202101201939. The next prime is 20202101202077. The reversal of 20202101202021 is 12020210120202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20202101202021 - 2³⁰ = 20201027460197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202101272021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3367016867001 + ... + 3367016867006.

It is an arithmetic number, because the mean of its divisors is an integer number (6734033734008).

Almost surely, 2^{20202101202021} is an apocalyptic number.

It is an amenable number.

20202101202021 is a deficient number, since it is larger than the sum of its proper divisors (6734033734011).

20202101202021 is an equidigital number, since it uses as much as digits as its factorization.

20202101202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6734033734010.

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

Adding to 20202101202021 its reverse (12020210120202), we get a palindrome (32222311322223).

The spelling of 20202101202021 in words is "twenty trillion, two hundred two billion, one hundred one million, two hundred two thousand, twenty-one".