12255421123 has 16 divisors (see below), whose sum is σ = 13692552192. Its totient is φ = 10874916000.

The previous prime is 12255421121. The next prime is 12255421181. The reversal of 12255421123 is 32112455221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12255421123 - 2¹ = 12255421121 is a prime.

It is a super-2 number, since 2×12255421123² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12255421091 and 12255421100.

It is not an unprimeable number, because it can be changed into a prime (12255421121) 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 in 15 ways as a sum of consecutive naturals, for example, 18190 + ... + 157612.

It is an arithmetic number, because the mean of its divisors is an integer number (855784512).

Almost surely, 2^12255421123 is an apocalyptic number.

12255421123 is a deficient number, since it is larger than the sum of its proper divisors (1437131069).

12255421123 is a wasteful number, since it uses less digits than its factorization.

12255421123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139626.

The product of its digits is 4800, while the sum is 28.

Adding to 12255421123 its reverse (32112455221), we get a palindrome (44367876344).

The spelling of 12255421123 in words is "twelve billion, two hundred fifty-five million, four hundred twenty-one thousand, one hundred twenty-three".