21233223233212 has 12 divisors (see below), whose sum is σ = 37158175161856. Its totient is φ = 10616601758400.

The previous prime is 21233223233207. The next prime is 21233223233231. The reversal of 21233223233212 is 21233232233212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4688212 + ... + 8027812.

Almost surely, 2^{21233223233212} is an apocalyptic number.

It is an amenable number.

21233223233212 is a deficient number, since it is larger than the sum of its proper divisors (15924951928644).

21233223233212 is a wasteful number, since it uses less digits than its factorization.

21233223233212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4929108 (or 4929106 counting only the distinct ones).

The product of its digits is 31104, while the sum is 31.

Adding to 21233223233212 its reverse (21233232233212), we get a palindrome (42466455466424).

Subtracting 21233223233212 from its reverse (21233232233212), we obtain a square (9000000 = 3000²).

The spelling of 21233223233212 in words is "twenty-one trillion, two hundred thirty-three billion, two hundred twenty-three million, two hundred thirty-three thousand, two hundred twelve".