1320421535519 has 2 divisors, whose sum is σ = 1320421535520. Its totient is φ = 1320421535518.

The previous prime is 1320421535497. The next prime is 1320421535539. The reversal of 1320421535519 is 9155351240231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1320421535519 - 2²⁴ = 1320404758303 is a prime.

It is a super-2 number, since 2×1320421535519² (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 (1320421535539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660210767759 + 660210767760.

It is an arithmetic number, because the mean of its divisors is an integer number (660210767760).

Almost surely, 2^{1320421535519} is an apocalyptic number.

1320421535519 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320421535519 is an equidigital number, since it uses as much as digits as its factorization.

1320421535519 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162000, while the sum is 41.

The spelling of 1320421535519 in words is "one trillion, three hundred twenty billion, four hundred twenty-one million, five hundred thirty-five thousand, five hundred nineteen".