202202001221 has 16 divisors (see below), whose sum is σ = 221428209600. Its totient is φ = 183117686400.

The previous prime is 202202001181. The next prime is 202202001227. The reversal of 202202001221 is 122100202202.

It is not a de Polignac number, because 202202001221 - 2²⁶ = 202134892357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202202001196 and 202202001205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202202001227) 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, 3432506 + ... + 3490916.

It is an arithmetic number, because the mean of its divisors is an integer number (13839263100).

Almost surely, 2^202202001221 is an apocalyptic number.

It is an amenable number.

202202001221 is a deficient number, since it is larger than the sum of its proper divisors (19226208379).

202202001221 is a wasteful number, since it uses less digits than its factorization.

202202001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59620.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 202202001221 its reverse (122100202202), we get a palindrome (324302203423).

The spelling of 202202001221 in words is "two hundred two billion, two hundred two million, one thousand, two hundred twenty-one".