12421023105 has 16 divisors (see below), whose sum is σ = 19880397504. Its totient is φ = 6622292160.

The previous prime is 12421023101. The next prime is 12421023107. The reversal of 12421023105 is 50132012421.

It is not a de Polignac number, because 12421023105 - 2² = 12421023101 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12421023101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94794 + ... + 183923.

It is an arithmetic number, because the mean of its divisors is an integer number (1242524844).

Almost surely, 2^12421023105 is an apocalyptic number.

12421023105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12421023105 is a deficient number, since it is larger than the sum of its proper divisors (7459374399).

12421023105 is a wasteful number, since it uses less digits than its factorization.

12421023105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281696.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 12421023105 its reverse (50132012421), we get a palindrome (62553035526).

The spelling of 12421023105 in words is "twelve billion, four hundred twenty-one million, twenty-three thousand, one hundred five".