22221021233 has 2 divisors, whose sum is σ = 22221021234. Its totient is φ = 22221021232.

The previous prime is 22221021191. The next prime is 22221021253. The reversal of 22221021233 is 33212012222.

It is a happy number.

It is an a-pointer prime, because the next prime (22221021253) can be obtained adding 22221021233 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14319233569 + 7901787664 = 119663^2 + 88892^2 .

It is a cyclic number.

It is not a de Polignac number, because 22221021233 - 2²⁰ = 22219972657 is a prime.

It is not a weakly prime, because it can be changed into another prime (22221021253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110510616 + 11110510617.

It is an arithmetic number, because the mean of its divisors is an integer number (11110510617).

Almost surely, 2^22221021233 is an apocalyptic number.

It is an amenable number.

22221021233 is a deficient number, since it is larger than the sum of its proper divisors (1).

22221021233 is an equidigital number, since it uses as much as digits as its factorization.

22221021233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 22221021233 its reverse (33212012222), we get a palindrome (55433033455).

The spelling of 22221021233 in words is "twenty-two billion, two hundred twenty-one million, twenty-one thousand, two hundred thirty-three".