21212033322 has 16 divisors (see below), whose sum is σ = 44919600192. Its totient is φ = 6654755520.

The previous prime is 21212033321. The next prime is 21212033357. The reversal of 21212033322 is 22333021212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21212033321) 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 7 ways as a sum of consecutive naturals, for example, 103980454 + ... + 103980657.

It is an arithmetic number, because the mean of its divisors is an integer number (2807475012).

Almost surely, 2^21212033322 is an apocalyptic number.

21212033322 is an abundant number, since it is smaller than the sum of its proper divisors (23707566870).

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

21212033322 is a wasteful number, since it uses less digits than its factorization.

21212033322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207961133.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21212033322 its reverse (22333021212), we get a palindrome (43545054534).

The spelling of 21212033322 in words is "twenty-one billion, two hundred twelve million, thirty-three thousand, three hundred twenty-two".