12225413021 has 2 divisors, whose sum is σ = 12225413022. Its totient is φ = 12225413020.

The previous prime is 12225412973. The next prime is 12225413051. The reversal of 12225413021 is 12031452221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11648884900 + 576528121 = 107930^2 + 24011^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12225413021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12225413051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6112706510 + 6112706511.

It is an arithmetic number, because the mean of its divisors is an integer number (6112706511).

Almost surely, 2^12225413021 is an apocalyptic number.

It is an amenable number.

12225413021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12225413021 is an equidigital number, since it uses as much as digits as its factorization.

12225413021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 12225413021 its reverse (12031452221), we get a palindrome (24256865242).

The spelling of 12225413021 in words is "twelve billion, two hundred twenty-five million, four hundred thirteen thousand, twenty-one".