21031200112230 has 448 divisors, whose sum is σ = 70953985732608. Its totient is φ = 4358359975680.

The previous prime is 21031200112229. The next prime is 21031200112231. The reversal of 21031200112230 is 3221100213012.

21031200112230 is a `hidden beast` number, since 2 + 10 + 312 + 0 + 0 + 112 + 230 = 666.

It is an interprime number because it is at equal distance from previous prime (21031200112229) and next prime (21031200112231).

It is a super-2 number, since 2×21031200112230² (a number of 27 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031200112231) by changing a digit.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 209325867 + ... + 209426313.

Almost surely, 2^{21031200112230} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21031200112230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35476992866304).

21031200112230 is an abundant number, since it is smaller than the sum of its proper divisors (49922785620378).

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

21031200112230 is a wasteful number, since it uses less digits than its factorization.

21031200112230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100863 (or 100848 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21031200112230 its reverse (3221100213012), we get a palindrome (24252300325242).

The spelling of 21031200112230 in words is "twenty-one trillion, thirty-one billion, two hundred million, one hundred twelve thousand, two hundred thirty".