21230233043312 has 40 divisors (see below), whose sum is σ = 42138385491552. Its totient is φ = 10355830041600.

The previous prime is 21230233043237. The next prime is 21230233043377. The reversal of 21230233043312 is 21334033203212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17666237 + ... + 18829667.

Almost surely, 2^{21230233043312} is an apocalyptic number.

It is an amenable number.

21230233043312 is a deficient number, since it is larger than the sum of its proper divisors (20908152448240).

21230233043312 is a wasteful number, since it uses less digits than its factorization.

21230233043312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1191297 (or 1191291 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 29.

Adding to 21230233043312 its reverse (21334033203212), we get a palindrome (42564266246524).

The spelling of 21230233043312 in words is "twenty-one trillion, two hundred thirty billion, two hundred thirty-three million, forty-three thousand, three hundred twelve".