12202226581 has 2 divisors, whose sum is σ = 12202226582. Its totient is φ = 12202226580.

The previous prime is 12202226549. The next prime is 12202226591. The reversal of 12202226581 is 18562220221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7824287025 + 4377939556 = 88455^2 + 66166^2 .

It is a cyclic number.

It is not a de Polignac number, because 12202226581 - 2⁵ = 12202226549 is a prime.

It is a super-2 number, since 2×12202226581² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12202226591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6101113290 + 6101113291.

It is an arithmetic number, because the mean of its divisors is an integer number (6101113291).

Almost surely, 2^12202226581 is an apocalyptic number.

It is an amenable number.

12202226581 is a deficient number, since it is larger than the sum of its proper divisors (1).

12202226581 is an equidigital number, since it uses as much as digits as its factorization.

12202226581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 31.

The spelling of 12202226581 in words is "twelve billion, two hundred two million, two hundred twenty-six thousand, five hundred eighty-one".