22221021253 has 2 divisors, whose sum is σ = 22221021254. Its totient is φ = 22221021252.

The previous prime is 22221021233. The next prime is 22221021293. The reversal of 22221021253 is 35212012222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17951444289 + 4269576964 = 133983^2 + 65342^2 .

It is a cyclic number.

It is not a de Polignac number, because 22221021253 - 2⁹ = 22221020741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22221021233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110510626 + 11110510627.

It is an arithmetic number, because the mean of its divisors is an integer number (11110510627).

Almost surely, 2^22221021253 is an apocalyptic number.

It is an amenable number.

22221021253 is a deficient number, since it is larger than the sum of its proper divisors (1).

22221021253 is an equidigital number, since it uses as much as digits as its factorization.

22221021253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 22221021253 its reverse (35212012222), we get a palindrome (57433033475).

The spelling of 22221021253 in words is "twenty-two billion, two hundred twenty-one million, twenty-one thousand, two hundred fifty-three".