1131320778979 has 2 divisors, whose sum is σ = 1131320778980. Its totient is φ = 1131320778978.

The previous prime is 1131320778943. The next prime is 1131320778997. The reversal of 1131320778979 is 9798770231311.

Together with next prime (1131320778997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1131320778979 - 2¹¹ = 1131320776931 is a prime.

It is not a weakly prime, because it can be changed into another prime (1131320778079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565660389489 + 565660389490.

It is an arithmetic number, because the mean of its divisors is an integer number (565660389490).

Almost surely, 2^{1131320778979} is an apocalyptic number.

1131320778979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131320778979 is an equidigital number, since it uses as much as digits as its factorization.

1131320778979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4000752, while the sum is 58.

The spelling of 1131320778979 in words is "one trillion, one hundred thirty-one billion, three hundred twenty million, seven hundred seventy-eight thousand, nine hundred seventy-nine".