202220120210021 has 12 divisors (see below), whose sum is σ = 209513955608100. Its totient is φ = 195172174541568.

The previous prime is 202220120210011. The next prime is 202220120210047. The reversal of 202220120210021 is 120012021022202.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 6291513707521 + 195928606502500 = 2508289^2 + 13997450^2 .

It is a de Polignac number, because none of the positive numbers 2^k-202220120210021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202220120210011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43887086 + ... + 48275423.

It is an arithmetic number, because the mean of its divisors is an integer number (17459496300675).

Almost surely, 2^{202220120210021} is an apocalyptic number.

It is an amenable number.

202220120210021 is a deficient number, since it is larger than the sum of its proper divisors (7293835398079).

202220120210021 is an equidigital number, since it uses as much as digits as its factorization.

202220120210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92165176 (or 92165147 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 202220120210021 its reverse (120012021022202), we get a palindrome (322232141232223).

The spelling of 202220120210021 in words is "two hundred two trillion, two hundred twenty billion, one hundred twenty million, two hundred ten thousand, twenty-one".