21212223304 has 64 divisors (see below), whose sum is σ = 41466182400. Its totient is φ = 10160640000.

The previous prime is 21212223299. The next prime is 21212223323. The reversal of 21212223304 is 40332221212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28244929 + ... + 28245679.

It is an arithmetic number, because the mean of its divisors is an integer number (647909100).

Almost surely, 2^21212223304 is an apocalyptic number.

It is an amenable number.

21212223304 is a deficient number, since it is larger than the sum of its proper divisors (20253959096).

21212223304 is a wasteful number, since it uses less digits than its factorization.

21212223304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1574 (or 1570 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21212223304 its reverse (40332221212), we get a palindrome (61544444516).

The spelling of 21212223304 in words is "twenty-one billion, two hundred twelve million, two hundred twenty-three thousand, three hundred four".