211320123 has 16 divisors (see below), whose sum is σ = 327471360. Its totient is φ = 118706976.

The previous prime is 211320119. The next prime is 211320143. The reversal of 211320123 is 321023112.

It is not a de Polignac number, because 211320123 - 2² = 211320119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211320143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84040 + ... + 86517.

It is an arithmetic number, because the mean of its divisors is an integer number (20466960).

Almost surely, 2^211320123 is an apocalyptic number.

211320123 is a deficient number, since it is larger than the sum of its proper divisors (116151237).

211320123 is a wasteful number, since it uses less digits than its factorization.

211320123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170626.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 211320123 is about 14536.8539581300. The cubic root of 211320123 is about 595.6351036905.

Adding to 211320123 its reverse (321023112), we get a palindrome (532343235).

The spelling of 211320123 in words is "two hundred eleven million, three hundred twenty thousand, one hundred twenty-three".