12221542589 has 2 divisors, whose sum is σ = 12221542590. Its totient is φ = 12221542588.

The previous prime is 12221542519. The next prime is 12221542621. The reversal of 12221542589 is 98524512221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8861021689 + 3360520900 = 94133^2 + 57970^2 .

It is a cyclic number.

It is not a de Polignac number, because 12221542589 - 2¹⁶ = 12221477053 is a prime.

It is a super-2 number, since 2×12221542589² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12221542519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110771294 + 6110771295.

It is an arithmetic number, because the mean of its divisors is an integer number (6110771295).

Almost surely, 2^12221542589 is an apocalyptic number.

It is an amenable number.

12221542589 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221542589 is an equidigital number, since it uses as much as digits as its factorization.

12221542589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 115200, while the sum is 41.

The spelling of 12221542589 in words is "twelve billion, two hundred twenty-one million, five hundred forty-two thousand, five hundred eighty-nine".