22423133221 has 4 divisors (see below), whose sum is σ = 22571630944. Its totient is φ = 22274635500.

The previous prime is 22423133207. The next prime is 22423133231. The reversal of 22423133221 is 12233132422.

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 22423133221 - 2¹¹ = 22423131173 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 (22423133231) 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, 74248635 + ... + 74248936.

It is an arithmetic number, because the mean of its divisors is an integer number (5642907736).

Almost surely, 2^22423133221 is an apocalyptic number.

It is an amenable number.

22423133221 is a deficient number, since it is larger than the sum of its proper divisors (148497723).

22423133221 is a wasteful number, since it uses less digits than its factorization.

22423133221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148497722.

The product of its digits is 3456, while the sum is 25.

Adding to 22423133221 its reverse (12233132422), we get a palindrome (34656265643).

The spelling of 22423133221 in words is "twenty-two billion, four hundred twenty-three million, one hundred thirty-three thousand, two hundred twenty-one".