1224311321957 has 2 divisors, whose sum is σ = 1224311321958. Its totient is φ = 1224311321956.

The previous prime is 1224311321929. The next prime is 1224311322023. The reversal of 1224311321957 is 7591231134221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 837534298561 + 386777023396 = 915169^2 + 621914^2 .

It is a cyclic number.

It is not a de Polignac number, because 1224311321957 - 2²⁸ = 1224042886501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1224311621957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612155660978 + 612155660979.

It is an arithmetic number, because the mean of its divisors is an integer number (612155660979).

Almost surely, 2^{1224311321957} is an apocalyptic number.

It is an amenable number.

1224311321957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1224311321957 is an equidigital number, since it uses as much as digits as its factorization.

1224311321957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 41.

The spelling of 1224311321957 in words is "one trillion, two hundred twenty-four billion, three hundred eleven million, three hundred twenty-one thousand, nine hundred fifty-seven".