1321241431 has 2 divisors, whose sum is σ = 1321241432. Its totient is φ = 1321241430.

The previous prime is 1321241419. The next prime is 1321241443. The reversal of 1321241431 is 1341421231.

It is a balanced prime because it is at equal distance from previous prime (1321241419) and next prime (1321241443).

It is a cyclic number.

It is not a de Polignac number, because 1321241431 - 2¹⁵ = 1321208663 is a prime.

It is a super-2 number, since 2×1321241431² = 3491357837981855522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321241491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660620715 + 660620716.

It is an arithmetic number, because the mean of its divisors is an integer number (660620716).

Almost surely, 2^1321241431 is an apocalyptic number.

1321241431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321241431 is an equidigital number, since it uses as much as digits as its factorization.

1321241431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 22.

The square root of 1321241431 is about 36348.8848659763. The cubic root of 1321241431 is about 1097.3050920736.

Adding to 1321241431 its reverse (1341421231), we get a palindrome (2662662662).

The spelling of 1321241431 in words is "one billion, three hundred twenty-one million, two hundred forty-one thousand, four hundred thirty-one".