21230130112 has 28 divisors (see below), whose sum is σ = 43024897440. Its totient is φ = 10389211136.

The previous prime is 21230130083. The next prime is 21230130127. The reversal of 21230130112 is 21103103212.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3525937 + ... + 3531952.

It is an arithmetic number, because the mean of its divisors is an integer number (1536603480).

Almost surely, 2^21230130112 is an apocalyptic number.

It is an amenable number.

21230130112 is an abundant number, since it is smaller than the sum of its proper divisors (21794767328).

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

21230130112 is an equidigital number, since it uses as much as digits as its factorization.

21230130112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7057948 (or 7057938 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21230130112 its reverse (21103103212), we get a palindrome (42333233324).

The spelling of 21230130112 in words is "twenty-one billion, two hundred thirty million, one hundred thirty thousand, one hundred twelve".