221110102221 has 4 divisors (see below), whose sum is σ = 294813469632. Its totient is φ = 147406734812.

The previous prime is 221110102201. The next prime is 221110102223. The reversal of 221110102221 is 122201011122.

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 221110102221 - 2²² = 221105907917 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221110102221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221110102223) 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, 36851683701 + ... + 36851683706.

It is an arithmetic number, because the mean of its divisors is an integer number (73703367408).

Almost surely, 2^221110102221 is an apocalyptic number.

It is an amenable number.

221110102221 is a deficient number, since it is larger than the sum of its proper divisors (73703367411).

221110102221 is an equidigital number, since it uses as much as digits as its factorization.

221110102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73703367410.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221110102221 its reverse (122201011122), we get a palindrome (343311113343).

The spelling of 221110102221 in words is "two hundred twenty-one billion, one hundred ten million, one hundred two thousand, two hundred twenty-one".