202102022221 has 16 divisors (see below), whose sum is σ = 230335747200. Its totient is φ = 175637224000.

The previous prime is 202102022207. The next prime is 202102022249. The reversal of 202102022221 is 122220201202.

It is not a de Polignac number, because 202102022221 - 2¹¹ = 202102020173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202102022195 and 202102022204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202102022021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3104161 + ... + 3168598.

It is an arithmetic number, because the mean of its divisors is an integer number (14395984200).

Almost surely, 2^202102022221 is an apocalyptic number.

It is an amenable number.

202102022221 is a deficient number, since it is larger than the sum of its proper divisors (28233724979).

202102022221 is a wasteful number, since it uses less digits than its factorization.

202102022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6272900.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 202102022221 its reverse (122220201202), we get a palindrome (324322223423).

The spelling of 202102022221 in words is "two hundred two billion, one hundred two million, twenty-two thousand, two hundred twenty-one".