21222232312 has 48 divisors (see below), whose sum is σ = 40801372920. Its totient is φ = 10347480000.

The previous prime is 21222232307. The next prime is 21222232313. The reversal of 21222232312 is 21323222212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222232313) 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 11 ways as a sum of consecutive naturals, for example, 3624187 + ... + 3630037.

Almost surely, 2^21222232312 is an apocalyptic number.

It is an amenable number.

21222232312 is a deficient number, since it is larger than the sum of its proper divisors (19579140608).

21222232312 is a wasteful number, since it uses less digits than its factorization.

21222232312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6092 (or 6021 counting only the distinct ones).

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

Adding to 21222232312 its reverse (21323222212), we get a palindrome (42545454524).

The spelling of 21222232312 in words is "twenty-one billion, two hundred twenty-two million, two hundred thirty-two thousand, three hundred twelve".