21212213332 has 12 divisors (see below), whose sum is σ = 37123422336. Its totient is φ = 10605521240.

The previous prime is 21212213329. The next prime is 21212213353. The reversal of 21212213332 is 23331221212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59044 + ... + 214267.

It is an arithmetic number, because the mean of its divisors is an integer number (3093618528).

Almost surely, 2^21212213332 is an apocalyptic number.

It is an amenable number.

21212213332 is a deficient number, since it is larger than the sum of its proper divisors (15911209004).

21212213332 is a wasteful number, since it uses less digits than its factorization.

21212213332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292718 (or 292716 counting only the distinct ones).

The product of its digits is 864, while the sum is 22.

Adding to 21212213332 its reverse (23331221212), we get a palindrome (44543434544).

The spelling of 21212213332 in words is "twenty-one billion, two hundred twelve million, two hundred thirteen thousand, three hundred thirty-two".