220400202221 has 4 divisors (see below), whose sum is σ = 220422236832. Its totient is φ = 220378167612.

The previous prime is 220400202181. The next prime is 220400202223. The reversal of 220400202221 is 122202004022.

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 a cyclic number.

It is not a de Polignac number, because 220400202221 - 2³⁴ = 203220333037 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220400202221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220400202223) 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, 11002295 + ... + 11022308.

It is an arithmetic number, because the mean of its divisors is an integer number (55105559208).

Almost surely, 2^220400202221 is an apocalyptic number.

It is an amenable number.

220400202221 is a deficient number, since it is larger than the sum of its proper divisors (22034611).

220400202221 is a wasteful number, since it uses less digits than its factorization.

220400202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22034610.

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 220400202221 its reverse (122202004022), we get a palindrome (342602206243).

The spelling of 220400202221 in words is "two hundred twenty billion, four hundred million, two hundred two thousand, two hundred twenty-one".