1321011023239 has 2 divisors, whose sum is σ = 1321011023240. Its totient is φ = 1321011023238.

The previous prime is 1321011023219. The next prime is 1321011023251. The reversal of 1321011023239 is 9323201101231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1321011023239 - 2⁵ = 1321011023207 is a prime.

It is a super-2 number, since 2×1321011023239² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321011023219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660505511619 + 660505511620.

It is an arithmetic number, because the mean of its divisors is an integer number (660505511620).

Almost surely, 2^{1321011023239} is an apocalyptic number.

1321011023239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321011023239 is an equidigital number, since it uses as much as digits as its factorization.

1321011023239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The spelling of 1321011023239 in words is "one trillion, three hundred twenty-one billion, eleven million, twenty-three thousand, two hundred thirty-nine".