1321333123231 has 16 divisors (see below), whose sum is σ = 1442570977440. Its totient is φ = 1200281758720.

The previous prime is 1321333123211. The next prime is 1321333123237. The reversal of 1321333123231 is 1323213331231.

It is a happy number.

It is not a de Polignac number, because 1321333123231 - 2¹¹ = 1321333121183 is a prime.

It is a super-2 number, since 2×1321333123231² (a number of 25 digits) contains 22 as substring.

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 1321333123231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321333123237) 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 15 ways as a sum of consecutive naturals, for example, 109077831 + ... + 109089943.

It is an arithmetic number, because the mean of its divisors is an integer number (90160686090).

Almost surely, 2^{1321333123231} is an apocalyptic number.

1321333123231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1321333123231 is a deficient number, since it is larger than the sum of its proper divisors (121237854209).

1321333123231 is a wasteful number, since it uses less digits than its factorization.

1321333123231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18986.

The product of its digits is 5832, while the sum is 28.

Adding to 1321333123231 its reverse (1323213331231), we get a palindrome (2644546454462).

The spelling of 1321333123231 in words is "one trillion, three hundred twenty-one billion, three hundred thirty-three million, one hundred twenty-three thousand, two hundred thirty-one".