21020112230 has 64 divisors (see below), whose sum is σ = 43690026240. Its totient is φ = 7212201984.

The previous prime is 21020112227. The next prime is 21020112233. The reversal of 21020112230 is 3221102012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21020112227) and next prime (21020112233).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020112233) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 114392 + ... + 234788.

It is an arithmetic number, because the mean of its divisors is an integer number (682656660).

Almost surely, 2^21020112230 is an apocalyptic number.

21020112230 is an abundant number, since it is smaller than the sum of its proper divisors (22669914010).

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

21020112230 is a wasteful number, since it uses less digits than its factorization.

21020112230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120513.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21020112230 its reverse (3221102012), we get a palindrome (24241214242).

The spelling of 21020112230 in words is "twenty-one billion, twenty million, one hundred twelve thousand, two hundred thirty".