1131031199279 has 2 divisors, whose sum is σ = 1131031199280. Its totient is φ = 1131031199278.

The previous prime is 1131031199237. The next prime is 1131031199299. The reversal of 1131031199279 is 9729911301311.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (9729911301311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1131031199279 - 2²⁴ = 1131014422063 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131031199299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565515599639 + 565515599640.

It is an arithmetic number, because the mean of its divisors is an integer number (565515599640).

Almost surely, 2^{1131031199279} is an apocalyptic number.

1131031199279 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131031199279 is an equidigital number, since it uses as much as digits as its factorization.

1131031199279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 91854, while the sum is 47.

The spelling of 1131031199279 in words is "one trillion, one hundred thirty-one billion, thirty-one million, one hundred ninety-nine thousand, two hundred seventy-nine".