1321320223331 has 16 divisors (see below), whose sum is σ = 1401939792000. Its totient is φ = 1241820353088.

The previous prime is 1321320223277. The next prime is 1321320223339. The reversal of 1321320223331 is 1333220231231.

It is not a de Polignac number, because 1321320223331 - 2¹⁸ = 1321319961187 is a prime.

It is a super-2 number, since 2×1321320223331² (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 1321320223331.

It is not an unprimeable number, because it can be changed into a prime (1321320223339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3797720 + ... + 4131018.

It is an arithmetic number, because the mean of its divisors is an integer number (87621237000).

Almost surely, 2^{1321320223331} is an apocalyptic number.

1321320223331 is a deficient number, since it is larger than the sum of its proper divisors (80619568669).

1321320223331 is a wasteful number, since it uses less digits than its factorization.

1321320223331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334978.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 1321320223331 its reverse (1333220231231), we get a palindrome (2654540454562).

The spelling of 1321320223331 in words is "one trillion, three hundred twenty-one billion, three hundred twenty million, two hundred twenty-three thousand, three hundred thirty-one".