21302223212 has 12 divisors (see below), whose sum is σ = 37281214656. Its totient is φ = 10650447600.

The previous prime is 21302223193. The next prime is 21302223227. The reversal of 21302223212 is 21232220312.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89948 + ... + 225155.

It is an arithmetic number, because the mean of its divisors is an integer number (3106767888).

Almost surely, 2^21302223212 is an apocalyptic number.

It is an amenable number.

21302223212 is a deficient number, since it is larger than the sum of its proper divisors (15978991444).

21302223212 is a wasteful number, since it uses less digits than its factorization.

21302223212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332008 (or 332006 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21302223212 its reverse (21232220312), we get a palindrome (42534443524).

The spelling of 21302223212 in words is "twenty-one billion, three hundred two million, two hundred twenty-three thousand, two hundred twelve".