202112212020221 has 8 divisors (see below), whose sum is σ = 202171012587264. Its totient is φ = 202053412693440.

The previous prime is 202112212020203. The next prime is 202112212020241. The reversal of 202112212020221 is 122020212211202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202112212020221 is a prime.

It is a super-2 number, since 2×202112212020221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202112212020193 and 202112212020202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202112212020241) 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, 400496165 + ... + 401000501.

It is an arithmetic number, because the mean of its divisors is an integer number (25271376573408).

Almost surely, 2^{202112212020221} is an apocalyptic number.

It is an amenable number.

202112212020221 is a deficient number, since it is larger than the sum of its proper divisors (58800567043).

202112212020221 is a wasteful number, since it uses less digits than its factorization.

202112212020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620131.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 202112212020221 its reverse (122020212211202), we get a palindrome (324132424231423).

The spelling of 202112212020221 in words is "two hundred two trillion, one hundred twelve billion, two hundred twelve million, twenty thousand, two hundred twenty-one".