202020211112021 has 4 divisors (see below), whose sum is σ = 202020427294752. Its totient is φ = 202019994929292.

The previous prime is 202020211112011. The next prime is 202020211112029. The reversal of 202020211112021 is 120211112020202.

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 a de Polignac number, because none of the positive numbers 2^k-202020211112021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202020211112029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106683521 + ... + 108560646.

It is an arithmetic number, because the mean of its divisors is an integer number (50505106823688).

Almost surely, 2^{202020211112021} is an apocalyptic number.

It is an amenable number.

202020211112021 is a deficient number, since it is larger than the sum of its proper divisors (216182731).

202020211112021 is an equidigital number, since it uses as much as digits as its factorization.

202020211112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216182730.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 202020211112021 its reverse (120211112020202), we get a palindrome (322231323132223).

The spelling of 202020211112021 in words is "two hundred two trillion, twenty billion, two hundred eleven million, one hundred twelve thousand, twenty-one".