21233020331212 has 12 divisors (see below), whose sum is σ = 37157941842280. Its totient is φ = 10616465519136.

The previous prime is 21233020331203. The next prime is 21233020331213. The reversal of 21233020331212 is 21213302033212.

It is not an unprimeable number, because it can be changed into a prime (21233020331213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10079913 + ... + 12002944.

Almost surely, 2^{21233020331212} is an apocalyptic number.

It is an amenable number.

21233020331212 is a deficient number, since it is larger than the sum of its proper divisors (15924921511068).

21233020331212 is a wasteful number, since it uses less digits than its factorization.

21233020331212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22323240 (or 22323238 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 21233020331212 its reverse (21213302033212), we get a palindrome (42446322364424).

The spelling of 21233020331212 in words is "twenty-one trillion, two hundred thirty-three billion, twenty million, three hundred thirty-one thousand, two hundred twelve".