21230113112 has 16 divisors (see below), whose sum is σ = 42868497840. Its totient is φ = 9798513696.

The previous prime is 21230113061. The next prime is 21230113127. The reversal of 21230113112 is 21131103212.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 102067748 + ... + 102067955.

It is an arithmetic number, because the mean of its divisors is an integer number (2679281115).

Almost surely, 2^21230113112 is an apocalyptic number.

It is an amenable number.

21230113112 is an abundant number, since it is smaller than the sum of its proper divisors (21638384728).

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

21230113112 is a wasteful number, since it uses less digits than its factorization.

21230113112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204135722 (or 204135718 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21230113112 its reverse (21131103212), we get a palindrome (42361216324).

The spelling of 21230113112 in words is "twenty-one billion, two hundred thirty million, one hundred thirteen thousand, one hundred twelve".