211322123 has 4 divisors (see below), whose sum is σ = 222444360. Its totient is φ = 200199888.

The previous prime is 211322063. The next prime is 211322141. The reversal of 211322123 is 321223112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211322123 - 2¹² = 211318027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211322143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5561090 + ... + 5561127.

It is an arithmetic number, because the mean of its divisors is an integer number (55611090).

Almost surely, 2^211322123 is an apocalyptic number.

211322123 is a deficient number, since it is larger than the sum of its proper divisors (11122237).

211322123 is a wasteful number, since it uses less digits than its factorization.

211322123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11122236.

The product of its digits is 144, while the sum is 17.

The square root of 211322123 is about 14536.9227486425. The cubic root of 211322123 is about 595.6369827772.

Adding to 211322123 its reverse (321223112), we get a palindrome (532545235).

The spelling of 211322123 in words is "two hundred eleven million, three hundred twenty-two thousand, one hundred twenty-three".