202012122202221 has 4 divisors (see below), whose sum is σ = 269349496269632. Its totient is φ = 134674748134812.

The previous prime is 202012122202213. The next prime is 202012122202273. The reversal of 202012122202221 is 122202221210202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 202012122202221 - 2³ = 202012122202213 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 (202012122202921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33668687033701 + ... + 33668687033706.

It is an arithmetic number, because the mean of its divisors is an integer number (67337374067408).

Almost surely, 2^{202012122202221} is an apocalyptic number.

It is an amenable number.

202012122202221 is a deficient number, since it is larger than the sum of its proper divisors (67337374067411).

202012122202221 is an equidigital number, since it uses as much as digits as its factorization.

202012122202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67337374067410.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 202012122202221 its reverse (122202221210202), we get a palindrome (324214343412423).

The spelling of 202012122202221 in words is "two hundred two trillion, twelve billion, one hundred twenty-two million, two hundred two thousand, two hundred twenty-one".