21303230112 has 72 divisors (see below), whose sum is σ = 62218417716. Its totient is φ = 6909152256.

The previous prime is 21303230107. The next prime is 21303230129. The reversal of 21303230112 is 21103230312.

21303230112 is a `hidden beast` number, since 21 + 303 + 230 + 112 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 21303153936 + 76176 = 145956^2 + 276^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×21303230112² (a number of 21 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 988933 + ... + 1010244.

Almost surely, 2^21303230112 is an apocalyptic number.

It is an amenable number.

21303230112 is an abundant number, since it is smaller than the sum of its proper divisors (40915187604).

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

21303230112 is a wasteful number, since it uses less digits than its factorization.

21303230112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1999230 (or 1999219 counting only the distinct ones).

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

Adding to 21303230112 its reverse (21103230312), we get a palindrome (42406460424).

The spelling of 21303230112 in words is "twenty-one billion, three hundred three million, two hundred thirty thousand, one hundred twelve".