12243418181 has 2 divisors, whose sum is σ = 12243418182. Its totient is φ = 12243418180.

The previous prime is 12243418093. The next prime is 12243418193. The reversal of 12243418181 is 18181434221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10693421281 + 1549996900 = 103409^2 + 39370^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12243418181 is a prime.

It is a super-2 number, since 2×12243418181² (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 (12243018181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6121709090 + 6121709091.

It is an arithmetic number, because the mean of its divisors is an integer number (6121709091).

Almost surely, 2^12243418181 is an apocalyptic number.

It is an amenable number.

12243418181 is a deficient number, since it is larger than the sum of its proper divisors (1).

12243418181 is an equidigital number, since it uses as much as digits as its factorization.

12243418181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12288, while the sum is 35.

The spelling of 12243418181 in words is "twelve billion, two hundred forty-three million, four hundred eighteen thousand, one hundred eighty-one".