220221022220021 has 16 divisors (see below), whose sum is σ = 223340903976960. Its totient is φ = 217121764903680.

The previous prime is 220221022219969. The next prime is 220221022220053. The reversal of 220221022220021 is 120022220122022.

It is a cyclic number.

It is not a de Polignac number, because 220221022220021 - 2⁴² = 215822975708917 is a prime.

It is a super-2 number, since 2×220221022220021² (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 = 220221022219975 and 220221022220002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220221022220621) 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, 674370260 + ... + 674696738.

It is an arithmetic number, because the mean of its divisors is an integer number (13958806498560).

Almost surely, 2^{220221022220021} is an apocalyptic number.

It is an amenable number.

220221022220021 is a deficient number, since it is larger than the sum of its proper divisors (3119881756939).

220221022220021 is a wasteful number, since it uses less digits than its factorization.

220221022220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358036.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 220221022220021 its reverse (120022220122022), we get a palindrome (340243242342043).

The spelling of 220221022220021 in words is "two hundred twenty trillion, two hundred twenty-one billion, twenty-two million, two hundred twenty thousand, twenty-one".