211333221234 has 96 divisors (see below), whose sum is σ = 488141349696. Its totient is φ = 68475844800.

The previous prime is 211333221233. The next prime is 211333221247. The reversal of 211333221234 is 432122333112.

211333221234 is a `hidden beast` number, since 2 + 113 + 332 + 212 + 3 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 211333221198 and 211333221207.

It is not an unprimeable number, because it can be changed into a prime (211333221233) by changing a digit.

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, 21339684 + ... + 21349584.

It is an arithmetic number, because the mean of its divisors is an integer number (5084805726).

Almost surely, 2^211333221234 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211333221234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244070674848).

211333221234 is an abundant number, since it is smaller than the sum of its proper divisors (276808128462).

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

211333221234 is a wasteful number, since it uses less digits than its factorization.

211333221234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11142 (or 11130 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

Adding to 211333221234 its reverse (432122333112), we get a palindrome (643455554346).

The spelling of 211333221234 in words is "two hundred eleven billion, three hundred thirty-three million, two hundred twenty-one thousand, two hundred thirty-four".