21203330212 has 24 divisors (see below), whose sum is σ = 39366333440. Its totient is φ = 9964594080.

The previous prime is 21203330177. The next prime is 21203330219.

21203330212 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21203330212² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 21203330212.

It is not an unprimeable number, because it can be changed into a prime (21203330219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1088739 + ... + 1108042.

Almost surely, 2^21203330212 is an apocalyptic number.

It is an amenable number.

21203330212 is a deficient number, since it is larger than the sum of its proper divisors (18163003228).

21203330212 is a wasteful number, since it uses less digits than its factorization.

21203330212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2196931 (or 2196929 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The spelling of 21203330212 in words is "twenty-one billion, two hundred three million, three hundred thirty thousand, two hundred twelve".