21203330112 has 84 divisors (see below), whose sum is σ = 62418161676. Its totient is φ = 6876748800.

The previous prime is 21203330047. The next prime is 21203330119. The reversal of 21203330112 is 21103330212.

21203330112 is a `hidden beast` number, since 21 + 203 + 330 + 112 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18250929216 + 2952400896 = 135096^2 + 54336^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21203330119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 476139 + ... + 518762.

Almost surely, 2^21203330112 is an apocalyptic number.

It is an amenable number.

21203330112 is an abundant number, since it is smaller than the sum of its proper divisors (41214831564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21203330112 is a wasteful number, since it uses less digits than its factorization.

21203330112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994956 (or 994943 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21203330112 its reverse (21103330212), we get a palindrome (42306660324).

The spelling of 21203330112 in words is "twenty-one billion, two hundred three million, three hundred thirty thousand, one hundred twelve".