1321203332331 has 10 divisors (see below), whose sum is σ = 1973649422492. Its totient is φ = 880802221500.

The previous prime is 1321203332311. The next prime is 1321203332359. The reversal of 1321203332331 is 1332333021231.

1321203332331 is a `hidden beast` number, since 1 + 321 + 2 + 0 + 3 + 3 + 3 + 2 + 331 = 666.

It is not a de Polignac number, because 1321203332331 - 2²⁶ = 1321136223467 is a prime.

It is a super-2 number, since 2×1321203332331² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321203332295 and 1321203332304.

It is not an unprimeable number, because it can be changed into a prime (1321203332311) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8155576045 + ... + 8155576206.

Almost surely, 2^{1321203332331} is an apocalyptic number.

1321203332331 is a deficient number, since it is larger than the sum of its proper divisors (652446090161).

1321203332331 is an equidigital number, since it uses as much as digits as its factorization.

1321203332331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16311152263 (or 16311152254 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 27.

Adding to 1321203332331 its reverse (1332333021231), we get a palindrome (2653536353562).

The spelling of 1321203332331 in words is "one trillion, three hundred twenty-one billion, two hundred three million, three hundred thirty-two thousand, three hundred thirty-one".