12315213105511 has 2 divisors, whose sum is σ = 12315213105512. Its totient is φ = 12315213105510.

The previous prime is 12315213105509. The next prime is 12315213105553. The reversal of 12315213105511 is 11550131251321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12315213105511 - 2¹ = 12315213105509 is a prime.

It is a super-2 number, since 2×12315213105511² (a number of 27 digits) contains 22 as substring.

Together with 12315213105509, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12315213105211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6157606552755 + 6157606552756.

It is an arithmetic number, because the mean of its divisors is an integer number (6157606552756).

Almost surely, 2^{12315213105511} is an apocalyptic number.

12315213105511 is a deficient number, since it is larger than the sum of its proper divisors (1).

12315213105511 is an equidigital number, since it uses as much as digits as its factorization.

12315213105511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4500, while the sum is 31.

Adding to 12315213105511 its reverse (11550131251321), we get a palindrome (23865344356832).

The spelling of 12315213105511 in words is "twelve trillion, three hundred fifteen billion, two hundred thirteen million, one hundred five thousand, five hundred eleven".