22530500221 has 2 divisors, whose sum is σ = 22530500222. Its totient is φ = 22530500220.

The previous prime is 22530500207. The next prime is 22530500227. The reversal of 22530500221 is 12200503522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14911828996 + 7618671225 = 122114^2 + 87285^2 .

It is a cyclic number.

It is not a de Polignac number, because 22530500221 - 2⁵ = 22530500189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22530500192 and 22530500201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22530500227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11265250110 + 11265250111.

It is an arithmetic number, because the mean of its divisors is an integer number (11265250111).

Almost surely, 2^22530500221 is an apocalyptic number.

It is an amenable number.

22530500221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22530500221 is an equidigital number, since it uses as much as digits as its factorization.

22530500221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 22.

The spelling of 22530500221 in words is "twenty-two billion, five hundred thirty million, five hundred thousand, two hundred twenty-one".