1331331201999 has 20 divisors (see below), whose sum is σ = 1993371784096. Its totient is φ = 885504332736.

The previous prime is 1331331201983. The next prime is 1331331202031. The reversal of 1331331201999 is 9991021331331.

1331331201999 is a `hidden beast` number, since 1 + 3 + 313 + 312 + 0 + 19 + 9 + 9 = 666.

It is not a de Polignac number, because 1331331201999 - 2⁴ = 1331331201983 is a prime.

It is a super-2 number, since 2×1331331201999² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331331221999) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18944359 + ... + 19014504.

Almost surely, 2^{1331331201999} is an apocalyptic number.

1331331201999 is a deficient number, since it is larger than the sum of its proper divisors (662040582097).

1331331201999 is an equidigital number, since it uses as much as digits as its factorization.

1331331201999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37959308 (or 37959299 counting only the distinct ones).

The product of its (nonzero) digits is 118098, while the sum is 45.

The spelling of 1331331201999 in words is "one trillion, three hundred thirty-one billion, three hundred thirty-one million, two hundred one thousand, nine hundred ninety-nine".