1231120313279 has 2 divisors, whose sum is σ = 1231120313280. Its totient is φ = 1231120313278.

The previous prime is 1231120313263. The next prime is 1231120313341. The reversal of 1231120313279 is 9723130211321.

It is a weak prime.

It is an emirp because it is prime and its reverse (9723130211321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1231120313279 - 2⁴ = 1231120313263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231120313879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615560156639 + 615560156640.

It is an arithmetic number, because the mean of its divisors is an integer number (615560156640).

Almost surely, 2^{1231120313279} is an apocalyptic number.

1231120313279 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231120313279 is an equidigital number, since it uses as much as digits as its factorization.

1231120313279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 35.

The spelling of 1231120313279 in words is "one trillion, two hundred thirty-one billion, one hundred twenty million, three hundred thirteen thousand, two hundred seventy-nine".