21222043312 has 40 divisors (see below), whose sum is σ = 43301524160. Its totient is φ = 10047965760.

The previous prime is 21222043307. The next prime is 21222043321. The reversal of 21222043312 is 21334022212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 706063 + ... + 735505.

It is an arithmetic number, because the mean of its divisors is an integer number (1082538104).

Almost surely, 2^21222043312 is an apocalyptic number.

It is an amenable number.

21222043312 is an abundant number, since it is smaller than the sum of its proper divisors (22079480848).

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

21222043312 is a wasteful number, since it uses less digits than its factorization.

21222043312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31841 (or 31835 counting only the distinct ones).

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

Adding to 21222043312 its reverse (21334022212), we get a palindrome (42556065524).

The spelling of 21222043312 in words is "twenty-one billion, two hundred twenty-two million, forty-three thousand, three hundred twelve".