220020021221 has 32 divisors (see below), whose sum is σ = 302616711936. Its totient is φ = 154396224000.

The previous prime is 220020021191. The next prime is 220020021239. The reversal of 220020021221 is 122120020022.

It is a cyclic number.

It is not a de Polignac number, because 220020021221 - 2³⁰ = 218946279397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220020021196 and 220020021205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220020021241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2639450 + ... + 2721531.

It is an arithmetic number, because the mean of its divisors is an integer number (9456772248).

Almost surely, 2^220020021221 is an apocalyptic number.

It is an amenable number.

220020021221 is a deficient number, since it is larger than the sum of its proper divisors (82596690715).

220020021221 is a wasteful number, since it uses less digits than its factorization.

220020021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5361053.

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

Adding to 220020021221 its reverse (122120020022), we get a palindrome (342140041243).

The spelling of 220020021221 in words is "two hundred twenty billion, twenty million, twenty-one thousand, two hundred twenty-one".