12122551123 has 2 divisors, whose sum is σ = 12122551124. Its totient is φ = 12122551122.

The previous prime is 12122551121. The next prime is 12122551127. The reversal of 12122551123 is 32115522121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12122551123 - 2¹ = 12122551121 is a prime.

It is a super-2 number, since 2×12122551123² (a number of 21 digits) contains 22 as substring.

Together with 12122551121, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12122551121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061275561 + 6061275562.

It is an arithmetic number, because the mean of its divisors is an integer number (6061275562).

Almost surely, 2^12122551123 is an apocalyptic number.

12122551123 is a deficient number, since it is larger than the sum of its proper divisors (1).

12122551123 is an equidigital number, since it uses as much as digits as its factorization.

12122551123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1200, while the sum is 25.

The spelling of 12122551123 in words is "twelve billion, one hundred twenty-two million, five hundred fifty-one thousand, one hundred twenty-three".