211323110221 has 8 divisors (see below), whose sum is σ = 222459196320. Its totient is φ = 200188405872.

The previous prime is 211323110209. The next prime is 211323110261. The reversal of 211323110221 is 122011323112.

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

It is not a de Polignac number, because 211323110221 - 2⁷ = 211323110093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211323110261) 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, 23815 + ... + 650548.

It is an arithmetic number, because the mean of its divisors is an integer number (27807399540).

Almost surely, 2^211323110221 is an apocalyptic number.

It is an amenable number.

211323110221 is a deficient number, since it is larger than the sum of its proper divisors (11136086099).

211323110221 is a wasteful number, since it uses less digits than its factorization.

211323110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690875.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 211323110221 its reverse (122011323112), we get a palindrome (333334433333).

The spelling of 211323110221 in words is "two hundred eleven billion, three hundred twenty-three million, one hundred ten thousand, two hundred twenty-one".