1321044311 has 2 divisors, whose sum is σ = 1321044312. Its totient is φ = 1321044310.

The previous prime is 1321044299. The next prime is 1321044343. The reversal of 1321044311 is 1134401231.

It is a weak prime.

It is an emirp because it is prime and its reverse (1134401231) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321044311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321044391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660522155 + 660522156.

It is an arithmetic number, because the mean of its divisors is an integer number (660522156).

Almost surely, 2^1321044311 is an apocalyptic number.

1321044311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321044311 is an equidigital number, since it uses as much as digits as its factorization.

1321044311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1321044311 is about 36346.1732648707. The cubic root of 1321044311 is about 1097.2505192725.

Adding to 1321044311 its reverse (1134401231), we get a palindrome (2455445542).

The spelling of 1321044311 in words is "one billion, three hundred twenty-one million, forty-four thousand, three hundred eleven".