221112022201 has 6 divisors (see below), whose sum is σ = 257211944250. Its totient is φ = 189524590416.

The previous prime is 221112022177. The next prime is 221112022211. The reversal of 221112022201 is 102220211122.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 195055605801 + 26056416400 = 441651^2 + 161420^2 .

It is not a de Polignac number, because 221112022201 - 2²⁵ = 221078467769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221112022211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2256245076 + ... + 2256245173.

It is an arithmetic number, because the mean of its divisors is an integer number (42868657375).

Almost surely, 2^221112022201 is an apocalyptic number.

It is an amenable number.

221112022201 is a deficient number, since it is larger than the sum of its proper divisors (36099922049).

221112022201 is an equidigital number, since it uses as much as digits as its factorization.

221112022201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4512490263 (or 4512490256 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221112022201 its reverse (102220211122), we get a palindrome (323332233323).

The spelling of 221112022201 in words is "two hundred twenty-one billion, one hundred twelve million, twenty-two thousand, two hundred one".