1321311233 has 16 divisors (see below), whose sum is σ = 1496309760. Its totient is φ = 1155896400.

The previous prime is 1321311227. The next prime is 1321311239. The reversal of 1321311233 is 3321131231.

It is an interprime number because it is at equal distance from previous prime (1321311227) and next prime (1321311239).

It is a cyclic number.

It is not a de Polignac number, because 1321311233 - 2¹⁶ = 1321245697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321311239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50216 + ... + 71862.

It is an arithmetic number, because the mean of its divisors is an integer number (93519360).

Almost surely, 2^1321311233 is an apocalyptic number.

It is an amenable number.

1321311233 is a deficient number, since it is larger than the sum of its proper divisors (174998527).

1321311233 is a wasteful number, since it uses less digits than its factorization.

1321311233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21868.

The product of its digits is 324, while the sum is 20.

The square root of 1321311233 is about 36349.8450203024. The cubic root of 1321311233 is about 1097.3244155016.

Adding to 1321311233 its reverse (3321131231), we get a palindrome (4642442464).

The spelling of 1321311233 in words is "one billion, three hundred twenty-one million, three hundred eleven thousand, two hundred thirty-three".