1231000321079 has 2 divisors, whose sum is σ = 1231000321080. Its totient is φ = 1231000321078.

The previous prime is 1231000320997. The next prime is 1231000321121. The reversal of 1231000321079 is 9701230001321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1231000321079 - 2²⁴ = 1230983543863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231000351079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615500160539 + 615500160540.

It is an arithmetic number, because the mean of its divisors is an integer number (615500160540).

Almost surely, 2^{1231000321079} is an apocalyptic number.

1231000321079 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231000321079 is an equidigital number, since it uses as much as digits as its factorization.

1231000321079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 29.

The spelling of 1231000321079 in words is "one trillion, two hundred thirty-one billion, three hundred twenty-one thousand, seventy-nine".