202102220110021 has 48 divisors (see below), whose sum is σ = 268585537024000. Its totient is φ = 148443990504480.

The previous prime is 202102220109989. The next prime is 202102220110031. The reversal of 202102220110021 is 120011022201202.

It is a happy number.

It is not a de Polignac number, because 202102220110021 - 2⁵ = 202102220109989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202102220109977 and 202102220110004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202102220110031) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28351245 + ... + 34756258.

Almost surely, 2^{202102220110021} is an apocalyptic number.

It is an amenable number.

202102220110021 is a deficient number, since it is larger than the sum of its proper divisors (66483316913979).

202102220110021 is a wasteful number, since it uses less digits than its factorization.

202102220110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63107750 (or 63107739 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 202102220110021 its reverse (120011022201202), we get a palindrome (322113242311223).

The spelling of 202102220110021 in words is "two hundred two trillion, one hundred two billion, two hundred twenty million, one hundred ten thousand, twenty-one".