211103231 has 4 divisors (see below), whose sum is σ = 213193464. Its totient is φ = 209013000.

The previous prime is 211103201. The next prime is 211103237. The reversal of 211103231 is 132301112.

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 211103231 - 2¹⁰ = 211102207 is a prime.

It is a super-2 number, since 2×211103231² = 89129148277278722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211103237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1044965 + ... + 1045166.

It is an arithmetic number, because the mean of its divisors is an integer number (53298366).

Almost surely, 2^211103231 is an apocalyptic number.

211103231 is a deficient number, since it is larger than the sum of its proper divisors (2090233).

211103231 is a wasteful number, since it uses less digits than its factorization.

211103231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2090232.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 211103231 is about 14529.3919693840. The cubic root of 211103231 is about 595.4312538622.

Adding to 211103231 its reverse (132301112), we get a palindrome (343404343).

The spelling of 211103231 in words is "two hundred eleven million, one hundred three thousand, two hundred thirty-one".