12043019981 has 2 divisors, whose sum is σ = 12043019982. Its totient is φ = 12043019980.

The previous prime is 12043019951. The next prime is 12043020047. The reversal of 12043019981 is 18991034021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9010755625 + 3032264356 = 94925^2 + 55066^2 .

It is a cyclic number.

It is not a de Polignac number, because 12043019981 - 2²⁶ = 11975911117 is a prime.

It is a super-2 number, since 2×12043019981² (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 (12043019951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6021509990 + 6021509991.

It is an arithmetic number, because the mean of its divisors is an integer number (6021509991).

Almost surely, 2^12043019981 is an apocalyptic number.

It is an amenable number.

12043019981 is a deficient number, since it is larger than the sum of its proper divisors (1).

12043019981 is an equidigital number, since it uses as much as digits as its factorization.

12043019981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 38.

The spelling of 12043019981 in words is "twelve billion, forty-three million, nineteen thousand, nine hundred eighty-one".