1021959711439 has 2 divisors, whose sum is σ = 1021959711440. Its totient is φ = 1021959711438.

The previous prime is 1021959711391. The next prime is 1021959711481. The reversal of 1021959711439 is 9341179591201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1021959711439 - 2²³ = 1021951322831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021959711239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510979855719 + 510979855720.

It is an arithmetic number, because the mean of its divisors is an integer number (510979855720).

Almost surely, 2^{1021959711439} is an apocalyptic number.

1021959711439 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021959711439 is an equidigital number, since it uses as much as digits as its factorization.

1021959711439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 612360, while the sum is 52.

The spelling of 1021959711439 in words is "one trillion, twenty-one billion, nine hundred fifty-nine million, seven hundred eleven thousand, four hundred thirty-nine".