1321433131 has 2 divisors, whose sum is σ = 1321433132. Its totient is φ = 1321433130.

The previous prime is 1321433101. The next prime is 1321433221. The reversal of 1321433131 is 1313341231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1321433131 - 2²⁵ = 1287878699 is a prime.

It is a super-2 number, since 2×1321433131² = 3492371039408926322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1321433101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660716565 + 660716566.

It is an arithmetic number, because the mean of its divisors is an integer number (660716566).

Almost surely, 2^1321433131 is an apocalyptic number.

1321433131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321433131 is an equidigital number, since it uses as much as digits as its factorization.

1321433131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 22.

The square root of 1321433131 is about 36351.5217150534. The cubic root of 1321433131 is about 1097.3581591383.

Adding to 1321433131 its reverse (1313341231), we get a palindrome (2634774362).

The spelling of 1321433131 in words is "one billion, three hundred twenty-one million, four hundred thirty-three thousand, one hundred thirty-one".