21242311324212 has 48 divisors (see below), whose sum is σ = 55532725440192. Its totient is φ = 6263089332480.

The previous prime is 21242311324193. The next prime is 21242311324219.

21242311324212 is nontrivially palindromic in base 10.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21242311324212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21242311324219) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2174678913 + ... + 2174688680.

It is an arithmetic number, because the mean of its divisors is an integer number (1156931780004).

Almost surely, 2^{21242311324212} is an apocalyptic number.

21242311324212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21242311324212 is an abundant number, since it is smaller than the sum of its proper divisors (34290414115980).

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

21242311324212 is a wasteful number, since it uses less digits than its factorization.

21242311324212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4349367648 (or 4349367646 counting only the distinct ones).

The product of its digits is 9216, while the sum is 30.

It can be divided in two parts, 2124231 and 1324212, that added together give a palindrome (3448443).

The spelling of 21242311324212 in words is "twenty-one trillion, two hundred forty-two billion, three hundred eleven million, three hundred twenty-four thousand, two hundred twelve".