221120200220221 has 4 divisors (see below), whose sum is σ = 221170557819744. Its totient is φ = 221069842620700.

The previous prime is 221120200220219. The next prime is 221120200220263. The reversal of 221120200220221 is 122022002021122.

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 221120200220221 - 2¹ = 221120200220219 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 (221120200220021) 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, 25178793175 + ... + 25178801956.

It is an arithmetic number, because the mean of its divisors is an integer number (55292639454936).

Almost surely, 2^{221120200220221} is an apocalyptic number.

It is an amenable number.

221120200220221 is a deficient number, since it is larger than the sum of its proper divisors (50357599523).

221120200220221 is an equidigital number, since it uses as much as digits as its factorization.

221120200220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50357599522.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 221120200220221 its reverse (122022002021122), we get a palindrome (343142202241343).

The spelling of 221120200220221 in words is "two hundred twenty-one trillion, one hundred twenty billion, two hundred million, two hundred twenty thousand, two hundred twenty-one".