1331213129999 has 4 divisors (see below), whose sum is σ = 1359536813664. Its totient is φ = 1302889446336.

The previous prime is 1331213129989. The next prime is 1331213130067. The reversal of 1331213129999 is 9999213121331.

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 1331213129999 - 2¹⁶ = 1331213064463 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1331213129999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331213129989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14161841762 + ... + 14161841855.

It is an arithmetic number, because the mean of its divisors is an integer number (339884203416).

Almost surely, 2^{1331213129999} is an apocalyptic number.

1331213129999 is a deficient number, since it is larger than the sum of its proper divisors (28323683665).

1331213129999 is an equidigital number, since it uses as much as digits as its factorization.

1331213129999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28323683664.

The product of its digits is 708588, while the sum is 53.

The spelling of 1331213129999 in words is "one trillion, three hundred thirty-one billion, two hundred thirteen million, one hundred twenty-nine thousand, nine hundred ninety-nine".