202122011021 has 4 divisors (see below), whose sum is σ = 230996584032. Its totient is φ = 173247438012.

The previous prime is 202122011017. The next prime is 202122011041. The reversal of 202122011021 is 120110221202.

202122011021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 202122011021 - 2² = 202122011017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202122010987 and 202122011005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202122011041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14437286495 + ... + 14437286508.

It is an arithmetic number, because the mean of its divisors is an integer number (57749146008).

Almost surely, 2^202122011021 is an apocalyptic number.

It is an amenable number.

202122011021 is a deficient number, since it is larger than the sum of its proper divisors (28874573011).

202122011021 is an equidigital number, since it uses as much as digits as its factorization.

202122011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28874573010.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 202122011021 its reverse (120110221202), we get a palindrome (322232232223).

The spelling of 202122011021 in words is "two hundred two billion, one hundred twenty-two million, eleven thousand, twenty-one".