1331021112999 has 4 divisors (see below), whose sum is σ = 1774694817336. Its totient is φ = 887347408664.

The previous prime is 1331021112997. The next prime is 1331021113027. The reversal of 1331021112999 is 9992111201331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1331021112999 - 2¹ = 1331021112997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1331021112999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331021112997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221836852164 + ... + 221836852169.

It is an arithmetic number, because the mean of its divisors is an integer number (443673704334).

Almost surely, 2^{1331021112999} is an apocalyptic number.

1331021112999 is a deficient number, since it is larger than the sum of its proper divisors (443673704337).

1331021112999 is an equidigital number, since it uses as much as digits as its factorization.

1331021112999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443673704336.

The product of its (nonzero) digits is 26244, while the sum is 42.

The spelling of 1331021112999 in words is "one trillion, three hundred thirty-one billion, twenty-one million, one hundred twelve thousand, nine hundred ninety-nine".