21242244224212 has 24 divisors (see below), whose sum is σ = 41861548737792. Its totient is φ = 9344095699200.

The previous prime is 21242244224189. The next prime is 21242244224269.

21242244224212 is nontrivially palindromic in base 10.

It is a super-4 number, since 4×21242244224212⁴ (a number of 54 digits) contains 4444 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7786745053 + ... + 7786747780.

It is an arithmetic number, because the mean of its divisors is an integer number (1744231197408).

Almost surely, 2^{21242244224212} is an apocalyptic number.

21242244224212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21242244224212 is a deficient number, since it is larger than the sum of its proper divisors (20619304513580).

21242244224212 is a wasteful number, since it uses less digits than its factorization.

21242244224212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15573492879 (or 15573492877 counting only the distinct ones).

The product of its digits is 65536, while the sum is 34.

It can be divided in two parts, 2124224 and 4224212, that added together give a palindrome (6348436).

The spelling of 21242244224212 in words is "twenty-one trillion, two hundred forty-two billion, two hundred forty-four million, two hundred twenty-four thousand, two hundred twelve".