13212323557 has 2 divisors, whose sum is σ = 13212323558. Its totient is φ = 13212323556.

The previous prime is 13212323503. The next prime is 13212323561. The reversal of 13212323557 is 75532321231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7757910241 + 5454413316 = 88079^2 + 73854^2 .

It is an emirp because it is prime and its reverse (75532321231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13212323557 - 2¹⁹ = 13211799269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13212303557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6606161778 + 6606161779.

It is an arithmetic number, because the mean of its divisors is an integer number (6606161779).

Almost surely, 2^13212323557 is an apocalyptic number.

It is an amenable number.

13212323557 is a deficient number, since it is larger than the sum of its proper divisors (1).

13212323557 is an equidigital number, since it uses as much as digits as its factorization.

13212323557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37800, while the sum is 34.

Adding to 13212323557 its reverse (75532321231), we get a palindrome (88744644788).

The spelling of 13212323557 in words is "thirteen billion, two hundred twelve million, three hundred twenty-three thousand, five hundred fifty-seven".