1321335500057 has 2 divisors, whose sum is σ = 1321335500058. Its totient is φ = 1321335500056.

The previous prime is 1321335500039. The next prime is 1321335500131. The reversal of 1321335500057 is 7500055331231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1268639542921 + 52695957136 = 1126339^2 + 229556^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321335500057 is a prime.

It is not a weakly prime, because it can be changed into another prime (1321335500657) 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, 660667750028 + 660667750029.

It is an arithmetic number, because the mean of its divisors is an integer number (660667750029).

Almost surely, 2^{1321335500057} is an apocalyptic number.

It is an amenable number.

1321335500057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321335500057 is an equidigital number, since it uses as much as digits as its factorization.

1321335500057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47250, while the sum is 35.

The spelling of 1321335500057 in words is "one trillion, three hundred twenty-one billion, three hundred thirty-five million, five hundred thousand, fifty-seven".