21212003322 has 48 divisors (see below), whose sum is σ = 47974006080. Its totient is φ = 6760930176.

The previous prime is 21212003321. The next prime is 21212003327. The reversal of 21212003322 is 22330021212.

21212003322 is a `hidden beast` number, since 212 + 120 + 0 + 332 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21212003295 and 21212003304.

It is not an unprimeable number, because it can be changed into a prime (21212003321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1523629 + ... + 1537487.

It is an arithmetic number, because the mean of its divisors is an integer number (999458460).

Almost surely, 2^21212003322 is an apocalyptic number.

21212003322 is an abundant number, since it is smaller than the sum of its proper divisors (26762002758).

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

21212003322 is a wasteful number, since it uses less digits than its factorization.

21212003322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17587 (or 17584 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21212003322 its reverse (22330021212), we get a palindrome (43542024534).

The spelling of 21212003322 in words is "twenty-one billion, two hundred twelve million, three thousand, three hundred twenty-two".