21423106334120 has 32 divisors (see below), whose sum is σ = 48202285350600. Its totient is φ = 8569189893888.

The previous prime is 21423106334087. The next prime is 21423106334167. The reversal of 21423106334120 is 2143360132412.

It can be written as a sum of positive squares in 4 ways, for example, as 19762879238116 + 1660227096004 = 4445546^2 + 1288498^2 .

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, 5311166 + ... + 8429394.

Almost surely, 2^{21423106334120} is an apocalyptic number.

21423106334120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21423106334120 is an abundant number, since it is smaller than the sum of its proper divisors (26779179016480).

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

21423106334120 is a wasteful number, since it uses less digits than its factorization.

21423106334120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3289997 (or 3289993 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

Adding to 21423106334120 its reverse (2143360132412), we get a palindrome (23566466466532).

The spelling of 21423106334120 in words is "twenty-one trillion, four hundred twenty-three billion, one hundred six million, three hundred thirty-four thousand, one hundred twenty".