22241111213221 has 4 divisors (see below), whose sum is σ = 22278118054444. Its totient is φ = 22204104372000.

The previous prime is 22241111213197. The next prime is 22241111213231. The reversal of 22241111213221 is 12231211114222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13678236528100 + 8562874685121 = 3698410^2 + 2926239^2 .

It is a cyclic number.

It is not a de Polignac number, because 22241111213221 - 2²⁹ = 22240574342309 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 (22241111213231) 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, 18503419710 + ... + 18503420911.

It is an arithmetic number, because the mean of its divisors is an integer number (5569529513611).

Almost surely, 2^{22241111213221} is an apocalyptic number.

It is an amenable number.

22241111213221 is a deficient number, since it is larger than the sum of its proper divisors (37006841223).

22241111213221 is an equidigital number, since it uses as much as digits as its factorization.

22241111213221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37006841222.

The product of its digits is 768, while the sum is 25.

Adding to 22241111213221 its reverse (12231211114222), we get a palindrome (34472322327443).

The spelling of 22241111213221 in words is "twenty-two trillion, two hundred forty-one billion, one hundred eleven million, two hundred thirteen thousand, two hundred twenty-one".