21223330312 has 16 divisors (see below), whose sum is σ = 39940588800. Its totient is φ = 10572506640.

The previous prime is 21223330309. The next prime is 21223330313. The reversal of 21223330312 is 21303332212.

It is not an unprimeable number, because it can be changed into a prime (21223330313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4892512 + ... + 4896847.

It is an arithmetic number, because the mean of its divisors is an integer number (2496286800).

Almost surely, 2^21223330312 is an apocalyptic number.

It is an amenable number.

21223330312 is a deficient number, since it is larger than the sum of its proper divisors (18717258488).

21223330312 is a wasteful number, since it uses less digits than its factorization.

21223330312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9789636 (or 9789632 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21223330312 its reverse (21303332212), we get a palindrome (42526662524).

The spelling of 21223330312 in words is "twenty-one billion, two hundred twenty-three million, three hundred thirty thousand, three hundred twelve".