21300203212 has 6 divisors (see below), whose sum is σ = 37275355628. Its totient is φ = 10650101604.

The previous prime is 21300203189. The next prime is 21300203233. The reversal of 21300203212 is 21230200312.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2662525398 + ... + 2662525405.

Almost surely, 2^21300203212 is an apocalyptic number.

It is an amenable number.

21300203212 is a deficient number, since it is larger than the sum of its proper divisors (15975152416).

21300203212 is a wasteful number, since it uses less digits than its factorization.

21300203212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5325050807 (or 5325050805 counting only the distinct ones).

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

Adding to 21300203212 its reverse (21230200312), we get a palindrome (42530403524).

The spelling of 21300203212 in words is "twenty-one billion, three hundred million, two hundred three thousand, two hundred twelve".