1321434311 has 2 divisors, whose sum is σ = 1321434312. Its totient is φ = 1321434310.

The previous prime is 1321434307. The next prime is 1321434347. The reversal of 1321434311 is 1134341231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1321434311 - 2² = 1321434307 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321434011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660717155 + 660717156.

It is an arithmetic number, because the mean of its divisors is an integer number (660717156).

Almost surely, 2^1321434311 is an apocalyptic number.

1321434311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321434311 is an equidigital number, since it uses as much as digits as its factorization.

1321434311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 23.

The square root of 1321434311 is about 36351.5379454570. The cubic root of 1321434311 is about 1097.3584857741.

Adding to 1321434311 its reverse (1134341231), we get a palindrome (2455775542).

The spelling of 1321434311 in words is "one billion, three hundred twenty-one million, four hundred thirty-four thousand, three hundred eleven".