12081040981 has 2 divisors, whose sum is σ = 12081040982. Its totient is φ = 12081040980.

The previous prime is 12081040919. The next prime is 12081040987. The reversal of 12081040981 is 18904018021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7632817956 + 4448223025 = 87366^2 + 66695^2 .

It is a cyclic number.

It is not a de Polignac number, because 12081040981 - 2¹⁵ = 12081008213 is a prime.

It is a super-2 number, since 2×12081040981² (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 (12081040987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6040520490 + 6040520491.

It is an arithmetic number, because the mean of its divisors is an integer number (6040520491).

Almost surely, 2^12081040981 is an apocalyptic number.

It is an amenable number.

12081040981 is a deficient number, since it is larger than the sum of its proper divisors (1).

12081040981 is an equidigital number, since it uses as much as digits as its factorization.

12081040981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 34.

The spelling of 12081040981 in words is "twelve billion, eighty-one million, forty thousand, nine hundred eighty-one".