12102200420 has 48 divisors (see below), whose sum is σ = 26327170800. Its totient is φ = 4669716480.

The previous prime is 12102200399. The next prime is 12102200477. The reversal of 12102200420 is 2400220121.

It can be written as a sum of positive squares in 8 ways, for example, as 966463744 + 11135736676 = 31088^2 + 105526^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12102200395 and 12102200404.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9935 + ... + 155894.

It is an arithmetic number, because the mean of its divisors is an integer number (548482725).

Almost surely, 2^12102200420 is an apocalyptic number.

12102200420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12102200420 is an abundant number, since it is smaller than the sum of its proper divisors (14224970380).

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

12102200420 is a wasteful number, since it uses less digits than its factorization.

12102200420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165968 (or 165966 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 12102200420 its reverse (2400220121), we get a palindrome (14502420541).

The spelling of 12102200420 in words is "twelve billion, one hundred two million, two hundred thousand, four hundred twenty".