11981391769043 has 2 divisors, whose sum is σ = 11981391769044. Its totient is φ = 11981391769042.

The previous prime is 11981391769027. The next prime is 11981391769051. The reversal of 11981391769043 is 34096719318911.

It is a strong prime.

It is an emirp because it is prime and its reverse (34096719318911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11981391769043 - 2⁴ = 11981391769027 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (11981391769073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5990695884521 + 5990695884522.

It is an arithmetic number, because the mean of its divisors is an integer number (5990695884522).

Almost surely, 2^{11981391769043} is an apocalyptic number.

11981391769043 is a deficient number, since it is larger than the sum of its proper divisors (1).

11981391769043 is an equidigital number, since it uses as much as digits as its factorization.

11981391769043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8817984, while the sum is 62.

The spelling of 11981391769043 in words is "eleven trillion, nine hundred eighty-one billion, three hundred ninety-one million, seven hundred sixty-nine thousand, forty-three".