1031321121999 has 32 divisors (see below), whose sum is σ = 1583740108800. Its totient is φ = 584766322272.

The previous prime is 1031321121997. The next prime is 1031321122031. The reversal of 1031321121999 is 9991211231301.

It is not a de Polignac number, because 1031321121999 - 2¹ = 1031321121997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1031321121999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031321121997) 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 31 ways as a sum of consecutive naturals, for example, 1197472 + ... + 1869914.

It is an arithmetic number, because the mean of its divisors is an integer number (49491878400).

Almost surely, 2^{1031321121999} is an apocalyptic number.

1031321121999 is a deficient number, since it is larger than the sum of its proper divisors (552418986801).

1031321121999 is a wasteful number, since it uses less digits than its factorization.

1031321121999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673019.

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

The spelling of 1031321121999 in words is "one trillion, thirty-one billion, three hundred twenty-one million, one hundred twenty-one thousand, nine hundred ninety-nine".