1321432031 has 2 divisors, whose sum is σ = 1321432032. Its totient is φ = 1321432030.

The previous prime is 1321432019. The next prime is 1321432037. The reversal of 1321432031 is 1302341231.

It is a strong prime.

It is an emirp because it is prime and its reverse (1302341231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1321432031 - 2³⁰ = 247690207 is a prime.

It is a super-2 number, since 2×1321432031² = 3492365225105569922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1321431994 and 1321432012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321432037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660716015 + 660716016.

It is an arithmetic number, because the mean of its divisors is an integer number (660716016).

Almost surely, 2^1321432031 is an apocalyptic number.

1321432031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321432031 is an equidigital number, since it uses as much as digits as its factorization.

1321432031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1321432031 is about 36351.5065850097. The cubic root of 1321432031 is about 1097.3578546471.

Adding to 1321432031 its reverse (1302341231), we get a palindrome (2623773262).

The spelling of 1321432031 in words is "one billion, three hundred twenty-one million, four hundred thirty-two thousand, thirty-one".