12421234305 has 32 divisors (see below), whose sum is σ = 22456483200. Its totient is φ = 6512371776.

The previous prime is 12421234303. The next prime is 12421234313. The reversal of 12421234305 is 50343212421.

12421234305 is a `hidden beast` number, since 1 + 2 + 421 + 234 + 3 + 0 + 5 = 666.

It is not a de Polignac number, because 12421234305 - 2¹ = 12421234303 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (12421234303) 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, 771774 + ... + 787703.

It is an arithmetic number, because the mean of its divisors is an integer number (701765100).

Almost surely, 2^12421234305 is an apocalyptic number.

12421234305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12421234305 is a deficient number, since it is larger than the sum of its proper divisors (10035248895).

12421234305 is a wasteful number, since it uses less digits than its factorization.

12421234305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1559550 (or 1559544 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 12421234305 its reverse (50343212421), we get a palindrome (62764446726).

The spelling of 12421234305 in words is "twelve billion, four hundred twenty-one million, two hundred thirty-four thousand, three hundred five".