220423203221 has 6 divisors (see below), whose sum is σ = 238683113730. Its totient is φ = 203467572048.

The previous prime is 220423203211. The next prime is 220423203269. The reversal of 220423203221 is 122302324022.

It can be written as a sum of positive squares in 3 ways, for example, as 25336680625 + 195086522596 = 159175^2 + 441686^2 .

It is not a de Polignac number, because 220423203221 - 2¹⁸ = 220422941077 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 (220423203211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 652139486 + ... + 652139823.

It is an arithmetic number, because the mean of its divisors is an integer number (39780518955).

Almost surely, 2^220423203221 is an apocalyptic number.

It is an amenable number.

220423203221 is a deficient number, since it is larger than the sum of its proper divisors (18259910509).

220423203221 is a wasteful number, since it uses less digits than its factorization.

220423203221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1304279335 (or 1304279322 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 220423203221 its reverse (122302324022), we get a palindrome (342725527243).

The spelling of 220423203221 in words is "two hundred twenty billion, four hundred twenty-three million, two hundred three thousand, two hundred twenty-one".