1131320778923 has 2 divisors, whose sum is σ = 1131320778924. Its totient is φ = 1131320778922.

The previous prime is 1131320778901. The next prime is 1131320778943. The reversal of 1131320778923 is 3298770231311.

It is a strong prime.

It is an emirp because it is prime and its reverse (3298770231311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1131320778923 - 2²⁸ = 1131052343467 is a prime.

It is not a weakly prime, because it can be changed into another prime (1131320778943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565660389461 + 565660389462.

It is an arithmetic number, because the mean of its divisors is an integer number (565660389462).

Almost surely, 2^{1131320778923} is an apocalyptic number.

1131320778923 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131320778923 is an equidigital number, since it uses as much as digits as its factorization.

1131320778923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 47.

The spelling of 1131320778923 in words is "one trillion, one hundred thirty-one billion, three hundred twenty million, seven hundred seventy-eight thousand, nine hundred twenty-three".