21233000012 has 12 divisors (see below), whose sum is σ = 42466000080. Its totient is φ = 9099857136.

The previous prime is 21233000011. The next prime is 21233000059. The reversal of 21233000012 is 21000033212.

It is a happy number.

21233000012 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (21233000011) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 379160687 + ... + 379160742.

It is an arithmetic number, because the mean of its divisors is an integer number (3538833340).

Almost surely, 2^21233000012 is an apocalyptic number.

It is an amenable number.

21233000012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21233000012 is a wasteful number, since it uses less digits than its factorization.

21233000012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758321440 (or 758321438 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21233000012 its reverse (21000033212), we get a palindrome (42233033224).

The spelling of 21233000012 in words is "twenty-one billion, two hundred thirty-three million, twelve", and thus it is an aban number.