1321232444291 has 2 divisors, whose sum is σ = 1321232444292. Its totient is φ = 1321232444290.

The previous prime is 1321232444269. The next prime is 1321232444327. The reversal of 1321232444291 is 1924442321231.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321232444291 is a prime.

It is not a weakly prime, because it can be changed into another prime (1321232444261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660616222145 + 660616222146.

It is an arithmetic number, because the mean of its divisors is an integer number (660616222146).

Almost surely, 2^{1321232444291} is an apocalyptic number.

1321232444291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321232444291 is an equidigital number, since it uses as much as digits as its factorization.

1321232444291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 38.

The spelling of 1321232444291 in words is "one trillion, three hundred twenty-one billion, two hundred thirty-two million, four hundred forty-four thousand, two hundred ninety-one".