12123305435 has 32 divisors (see below), whose sum is σ = 15259104000. Its totient is φ = 9234441216.

The previous prime is 12123305431. The next prime is 12123305449. The reversal of 12123305435 is 53450332121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12123305435 - 2² = 12123305431 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a junction number, because it is equal to n+sod(n) for n = 12123305398 and 12123305407.

It is not an unprimeable number, because it can be changed into a prime (12123305431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5974001 + ... + 5976029.

It is an arithmetic number, because the mean of its divisors is an integer number (476847000).

Almost surely, 2^12123305435 is an apocalyptic number.

12123305435 is a deficient number, since it is larger than the sum of its proper divisors (3135798565).

12123305435 is a wasteful number, since it uses less digits than its factorization.

12123305435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2615.

The product of its (nonzero) digits is 10800, while the sum is 29.

Adding to 12123305435 its reverse (53450332121), we get a palindrome (65573637556).

The spelling of 12123305435 in words is "twelve billion, one hundred twenty-three million, three hundred five thousand, four hundred thirty-five".