21211132230 has 96 divisors (see below), whose sum is σ = 57881101824. Its totient is φ = 5588100576.

The previous prime is 21211132199. The next prime is 21211132301. The reversal of 21211132230 is 3223111212.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 149107 + ... + 254273.

It is an arithmetic number, because the mean of its divisors is an integer number (602928144).

Almost surely, 2^21211132230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21211132230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28940550912).

21211132230 is an abundant number, since it is smaller than the sum of its proper divisors (36669969594).

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

21211132230 is a wasteful number, since it uses less digits than its factorization.

21211132230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105272 (or 105260 counting only the distinct ones).

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

Adding to 21211132230 its reverse (3223111212), we get a palindrome (24434243442).

The spelling of 21211132230 in words is "twenty-one billion, two hundred eleven million, one hundred thirty-two thousand, two hundred thirty".