12125223345 has 16 divisors (see below), whose sum is σ = 19588712832. Its totient is φ = 6404000640.

The previous prime is 12125223337. The next prime is 12125223349. The reversal of 12125223345 is 54332252121.

12125223345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12125223345 - 2³ = 12125223337 is a prime.

It is a super-2 number, since 2×12125223345² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12125223349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3922476 + ... + 3925565.

It is an arithmetic number, because the mean of its divisors is an integer number (1224294552).

Almost surely, 2^12125223345 is an apocalyptic number.

12125223345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12125223345 is a deficient number, since it is larger than the sum of its proper divisors (7463489487).

12125223345 is a wasteful number, since it uses less digits than its factorization.

12125223345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7848152.

The product of its digits is 14400, while the sum is 30.

Adding to 12125223345 its reverse (54332252121), we get a palindrome (66457475466).

The spelling of 12125223345 in words is "twelve billion, one hundred twenty-five million, two hundred twenty-three thousand, three hundred forty-five".