12420434105 has 8 divisors (see below), whose sum is σ = 14906348352. Its totient is φ = 9935129008.

The previous prime is 12420434077. The next prime is 12420434137. The reversal of 12420434105 is 50143402421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12420434105 - 2²⁰ = 12419385529 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106157 + ... + 190026.

It is an arithmetic number, because the mean of its divisors is an integer number (1863293544).

Almost surely, 2^12420434105 is an apocalyptic number.

It is an amenable number.

12420434105 is a deficient number, since it is larger than the sum of its proper divisors (2485914247).

12420434105 is an equidigital number, since it uses as much as digits as its factorization.

12420434105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304575.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 12420434105 its reverse (50143402421), we get a palindrome (62563836526).

The spelling of 12420434105 in words is "twelve billion, four hundred twenty million, four hundred thirty-four thousand, one hundred five".