1302321231257 has 2 divisors, whose sum is σ = 1302321231258. Its totient is φ = 1302321231256.

The previous prime is 1302321231217. The next prime is 1302321231347. The reversal of 1302321231257 is 7521321232031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 897900275776 + 404420955481 = 947576^2 + 635941^2 .

It is a cyclic number.

It is not a de Polignac number, because 1302321231257 - 2¹⁶ = 1302321165721 is a prime.

It is not a weakly prime, because it can be changed into another prime (1302321231217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 651160615628 + 651160615629.

It is an arithmetic number, because the mean of its divisors is an integer number (651160615629).

Almost surely, 2^{1302321231257} is an apocalyptic number.

It is an amenable number.

1302321231257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1302321231257 is an equidigital number, since it uses as much as digits as its factorization.

1302321231257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 32.

Adding to 1302321231257 its reverse (7521321232031), we get a palindrome (8823642463288).

The spelling of 1302321231257 in words is "one trillion, three hundred two billion, three hundred twenty-one million, two hundred thirty-one thousand, two hundred fifty-seven".