21213321112 has 32 divisors (see below), whose sum is σ = 39876480000. Its totient is φ = 10579634208.

The previous prime is 21213321109. The next prime is 21213321139. The reversal of 21213321112 is 21112331212.

It is a self number, because there is not a number n which added to its sum of digits gives 21213321112.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6313689 + ... + 6317047.

It is an arithmetic number, because the mean of its divisors is an integer number (1246140000).

Almost surely, 2^21213321112 is an apocalyptic number.

It is an amenable number.

21213321112 is a deficient number, since it is larger than the sum of its proper divisors (18663158888).

21213321112 is a wasteful number, since it uses less digits than its factorization.

21213321112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5143 (or 5139 counting only the distinct ones).

The product of its digits is 144, while the sum is 19.

Adding to 21213321112 its reverse (21112331212), we get a palindrome (42325652324).

It can be divided in two parts, 2121 and 3321112, that added together give a palindrome (3323233).

The spelling of 21213321112 in words is "twenty-one billion, two hundred thirteen million, three hundred twenty-one thousand, one hundred twelve".