21233000212 has 12 divisors (see below), whose sum is σ = 37179203796. Its totient is φ = 10610370560.

The previous prime is 21233000207. The next prime is 21233000279. The reversal of 21233000212 is 21200033212.

It can be written as a sum of positive squares in 2 ways, for example, as 7034847876 + 14198152336 = 83874^2 + 119156^2 .

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1524589 + ... + 1538452.

It is an arithmetic number, because the mean of its divisors is an integer number (3098266983).

Almost surely, 2^21233000212 is an apocalyptic number.

It is an amenable number.

21233000212 is a deficient number, since it is larger than the sum of its proper divisors (15946203584).

21233000212 is a wasteful number, since it uses less digits than its factorization.

21233000212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3064778 (or 3064776 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21233000212 its reverse (21200033212), we get a palindrome (42433033424).

It can be divided in two parts, 21233000 and 212, that added together give a palindrome (21233212).

The spelling of 21233000212 in words is "twenty-one billion, two hundred thirty-three million, two hundred twelve", and thus it is an aban number.