213221311110 has 96 divisors (see below), whose sum is σ = 574781156352. Its totient is φ = 54782291520.

The previous prime is 213221311109. The next prime is 213221311183. The reversal of 213221311110 is 11113122312.

213221311110 is a `hidden beast` number, since 21 + 3 + 221 + 311 + 110 = 666.

213221311110 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×213221311110² (a number of 23 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 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 47 ways as a sum of consecutive naturals, for example, 464997 + ... + 801663.

It is an arithmetic number, because the mean of its divisors is an integer number (5987303712).

Almost surely, 2^213221311110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213221311110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287390578176).

213221311110 is an abundant number, since it is smaller than the sum of its proper divisors (361559845242).

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

213221311110 is a wasteful number, since it uses less digits than its factorization.

213221311110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336938 (or 336935 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 213221311110 its reverse (11113122312), we get a palindrome (224334433422).

The spelling of 213221311110 in words is "two hundred thirteen billion, two hundred twenty-one million, three hundred eleven thousand, one hundred ten".