12420334100 has 18 divisors (see below), whose sum is σ = 26952125214. Its totient is φ = 4968133600.

The previous prime is 12420334081. The next prime is 12420334111. The reversal of 12420334100 is 143302421.

It can be written as a sum of positive squares in 3 ways, for example, as 98446084 + 12321888016 = 9922^2 + 111004^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 62101571 + ... + 62101770.

Almost surely, 2^12420334100 is an apocalyptic number.

12420334100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12420334100 is an abundant number, since it is smaller than the sum of its proper divisors (14531791114).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12420334100 is a wasteful number, since it uses less digits than its factorization.

12420334100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124203355 (or 124203348 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 12420334100 its reverse (143302421), we get a palindrome (12563636521).

The spelling of 12420334100 in words is "twelve billion, four hundred twenty million, three hundred thirty-four thousand, one hundred".