23224122221 has 4 divisors (see below), whose sum is σ = 23225936412. Its totient is φ = 23222308032.

The previous prime is 23224122217. The next prime is 23224122239. The reversal of 23224122221 is 12222142232.

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 10989328900 + 12234793321 = 104830^2 + 110611^2 .

It is a cyclic number.

It is not a de Polignac number, because 23224122221 - 2² = 23224122217 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 (23224122421) 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, 887756 + ... + 913541.

It is an arithmetic number, because the mean of its divisors is an integer number (5806484103).

Almost surely, 2^23224122221 is an apocalyptic number.

It is an amenable number.

23224122221 is a deficient number, since it is larger than the sum of its proper divisors (1814191).

23224122221 is a wasteful number, since it uses less digits than its factorization.

23224122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1814190.

The product of its digits is 1536, while the sum is 23.

Adding to 23224122221 its reverse (12222142232), we get a palindrome (35446264453).

The spelling of 23224122221 in words is "twenty-three billion, two hundred twenty-four million, one hundred twenty-two thousand, two hundred twenty-one".