21243422424112 has 40 divisors (see below), whose sum is σ = 48661041520800. Its totient is φ = 8790381691392.

The previous prime is 21243422424109. The next prime is 21243422424121. The reversal of 21243422424112 is 21142422434212.

It is a happy number.

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, 3270228037 + ... + 3270234532.

It is an arithmetic number, because the mean of its divisors is an integer number (1216526038020).

Almost surely, 2^{21243422424112} is an apocalyptic number.

It is an amenable number.

21243422424112 is an abundant number, since it is smaller than the sum of its proper divisors (27417619096688).

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

21243422424112 is a wasteful number, since it uses less digits than its factorization.

21243422424112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6540462613 (or 6540462607 counting only the distinct ones).

The product of its digits is 49152, while the sum is 34.

Adding to 21243422424112 its reverse (21142422434212), we get a palindrome (42385844858324).

It can be divided in two parts, 2124342 and 2424112, that added together give a palindrome (4548454).

The spelling of 21243422424112 in words is "twenty-one trillion, two hundred forty-three billion, four hundred twenty-two million, four hundred twenty-four thousand, one hundred twelve".