21044333212 has 36 divisors (see below), whose sum is σ = 42948318504. Its totient is φ = 8996248800.

The previous prime is 21044333203. The next prime is 21044333213. The reversal of 21044333212 is 21233344012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21044333213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57414 + ... + 213037.

Almost surely, 2^21044333212 is an apocalyptic number.

It is an amenable number.

21044333212 is an abundant number, since it is smaller than the sum of its proper divisors (21903985292).

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

21044333212 is a wasteful number, since it uses less digits than its factorization.

21044333212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270866 (or 270857 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21044333212 its reverse (21233344012), we get a palindrome (42277677224).

The spelling of 21044333212 in words is "twenty-one billion, forty-four million, three hundred thirty-three thousand, two hundred twelve".