12615238123 has 2 divisors, whose sum is σ = 12615238124. Its totient is φ = 12615238122.

The previous prime is 12615238121. The next prime is 12615238193. The reversal of 12615238123 is 32183251621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12615238123 - 2¹ = 12615238121 is a prime.

Together with 12615238121, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12615238121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6307619061 + 6307619062.

It is an arithmetic number, because the mean of its divisors is an integer number (6307619062).

Almost surely, 2^12615238123 is an apocalyptic number.

12615238123 is a deficient number, since it is larger than the sum of its proper divisors (1).

12615238123 is an equidigital number, since it uses as much as digits as its factorization.

12615238123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 34.

Adding to 12615238123 its reverse (32183251621), we get a palindrome (44798489744).

The spelling of 12615238123 in words is "twelve billion, six hundred fifteen million, two hundred thirty-eight thousand, one hundred twenty-three".