12115553123 has 2 divisors, whose sum is σ = 12115553124. Its totient is φ = 12115553122.

The previous prime is 12115553069. The next prime is 12115553141. The reversal of 12115553123 is 32135551121.

It is a strong prime.

It is an emirp because it is prime and its reverse (32135551121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12115553123 - 2⁶ = 12115553059 is a prime.

It is not a weakly prime, because it can be changed into another prime (12115559123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6057776561 + 6057776562.

It is an arithmetic number, because the mean of its divisors is an integer number (6057776562).

Almost surely, 2^12115553123 is an apocalyptic number.

12115553123 is a deficient number, since it is larger than the sum of its proper divisors (1).

12115553123 is an equidigital number, since it uses as much as digits as its factorization.

12115553123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4500, while the sum is 29.

The spelling of 12115553123 in words is "twelve billion, one hundred fifteen million, five hundred fifty-three thousand, one hundred twenty-three".