1331321221323 has 24 divisors (see below), whose sum is σ = 2040593890608. Its totient is φ = 833510886912.

The previous prime is 1331321221277. The next prime is 1331321221339. The reversal of 1331321221323 is 3231221231331.

1331321221323 is a `hidden beast` number, since 1 + 3 + 313 + 2 + 1 + 2 + 21 + 323 = 666.

It is not a de Polignac number, because 1331321221323 - 2²⁰ = 1331320172747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1331321221393) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9450261 + ... + 9590102.

It is an arithmetic number, because the mean of its divisors is an integer number (85024745442).

Almost surely, 2^{1331321221323} is an apocalyptic number.

1331321221323 is a deficient number, since it is larger than the sum of its proper divisors (709272669285).

1331321221323 is a wasteful number, since it uses less digits than its factorization.

1331321221323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19040843 (or 19040840 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

Adding to 1331321221323 its reverse (3231221231331), we get a palindrome (4562542452654).

The spelling of 1331321221323 in words is "one trillion, three hundred thirty-one billion, three hundred twenty-one million, two hundred twenty-one thousand, three hundred twenty-three".