211132123221 has 8 divisors (see below), whose sum is σ = 288375583104. Its totient is φ = 137321706080.

The previous prime is 211132123123. The next prime is 211132123229. The reversal of 211132123221 is 122321231112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211132123221 - 2⁹ = 211132122709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211132123229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 858260541 + ... + 858260786.

It is an arithmetic number, because the mean of its divisors is an integer number (36046947888).

Almost surely, 2^211132123221 is an apocalyptic number.

It is an amenable number.

211132123221 is a deficient number, since it is larger than the sum of its proper divisors (77243459883).

211132123221 is a wasteful number, since it uses less digits than its factorization.

211132123221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1716521371.

The product of its digits is 288, while the sum is 21.

Adding to 211132123221 its reverse (122321231112), we get a palindrome (333453354333).

The spelling of 211132123221 in words is "two hundred eleven billion, one hundred thirty-two million, one hundred twenty-three thousand, two hundred twenty-one".