1331320019999 has 2 divisors, whose sum is σ = 1331320020000. Its totient is φ = 1331320019998.

The previous prime is 1331320019989. The next prime is 1331320020011. The reversal of 1331320019999 is 9999100231331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1331320019999 - 2²⁴ = 1331303242783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1331320019989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665660009999 + 665660010000.

It is an arithmetic number, because the mean of its divisors is an integer number (665660010000).

Almost surely, 2^{1331320019999} is an apocalyptic number.

1331320019999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331320019999 is an equidigital number, since it uses as much as digits as its factorization.

1331320019999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 354294, while the sum is 50.

The spelling of 1331320019999 in words is "one trillion, three hundred thirty-one billion, three hundred twenty million, nineteen thousand, nine hundred ninety-nine".