22024011221 has 4 divisors (see below), whose sum is σ = 22030686444. Its totient is φ = 22017336000.

The previous prime is 22024011199. The next prime is 22024011257. The reversal of 22024011221 is 12211042022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12211042022 = 2 ⋅6105521011.

It can be written as a sum of positive squares in 2 ways, for example, as 9503520196 + 12520491025 = 97486^2 + 111895^2 .

It is a cyclic number.

It is not a de Polignac number, because 22024011221 - 2⁶ = 22024011157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22024011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22024011271) 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, 3332660 + ... + 3339261.

It is an arithmetic number, because the mean of its divisors is an integer number (5507671611).

Almost surely, 2^22024011221 is an apocalyptic number.

It is an amenable number.

22024011221 is a deficient number, since it is larger than the sum of its proper divisors (6675223).

22024011221 is an equidigital number, since it uses as much as digits as its factorization.

22024011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6675222.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 22024011221 its reverse (12211042022), we get a palindrome (34235053243).

The spelling of 22024011221 in words is "twenty-two billion, twenty-four million, eleven thousand, two hundred twenty-one".