202102211212221 has 8 divisors (see below), whose sum is σ = 269472278808160. Its totient is φ = 134733475545552.

The previous prime is 202102211212151. The next prime is 202102211212303. The reversal of 202102211212221 is 122212112201202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 202102211212221 - 2¹¹ = 202102211210173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202102211211221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332628211 + ... + 333235248.

It is an arithmetic number, because the mean of its divisors is an integer number (33684034851020).

Almost surely, 2^{202102211212221} is an apocalyptic number.

It is an amenable number.

202102211212221 is a deficient number, since it is larger than the sum of its proper divisors (67370067595939).

202102211212221 is a wasteful number, since it uses less digits than its factorization.

202102211212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665964635.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 202102211212221 its reverse (122212112201202), we get a palindrome (324314323413423).

The spelling of 202102211212221 in words is "two hundred two trillion, one hundred two billion, two hundred eleven million, two hundred twelve thousand, two hundred twenty-one".