12355521313 has 2 divisors, whose sum is σ = 12355521314. Its totient is φ = 12355521312.

The previous prime is 12355521281. The next prime is 12355521331. The reversal of 12355521313 is 31312555321.

Together with next prime (12355521331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8795251089 + 3560270224 = 93783^2 + 59668^2 .

It is an emirp because it is prime and its reverse (31312555321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12355521313 - 2⁵ = 12355521281 is a prime.

It is not a weakly prime, because it can be changed into another prime (12355521383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6177760656 + 6177760657.

It is an arithmetic number, because the mean of its divisors is an integer number (6177760657).

Almost surely, 2^12355521313 is an apocalyptic number.

It is an amenable number.

12355521313 is a deficient number, since it is larger than the sum of its proper divisors (1).

12355521313 is an equidigital number, since it uses as much as digits as its factorization.

12355521313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13500, while the sum is 31.

The spelling of 12355521313 in words is "twelve billion, three hundred fifty-five million, five hundred twenty-one thousand, three hundred thirteen".