13231320112181 has 2 divisors, whose sum is σ = 13231320112182. Its totient is φ = 13231320112180.

The previous prime is 13231320112163. The next prime is 13231320112223. The reversal of 13231320112181 is 18121102313231.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12951066340081 + 280253772100 = 3598759^2 + 529390^2 .

It is a cyclic number.

It is not a de Polignac number, because 13231320112181 - 2³⁴ = 13214140242997 is a prime.

It is a super-2 number, since 2×13231320112181² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13231320142181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6615660056090 + 6615660056091.

It is an arithmetic number, because the mean of its divisors is an integer number (6615660056091).

Almost surely, 2^{13231320112181} is an apocalyptic number.

It is an amenable number.

13231320112181 is a deficient number, since it is larger than the sum of its proper divisors (1).

13231320112181 is an equidigital number, since it uses as much as digits as its factorization.

13231320112181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 29.

The spelling of 13231320112181 in words is "thirteen trillion, two hundred thirty-one billion, three hundred twenty million, one hundred twelve thousand, one hundred eighty-one".