2111123231 has 8 divisors (see below), whose sum is σ = 2539697280. Its totient is φ = 1714295448.

The previous prime is 2111123213. The next prime is 2111123293. The reversal of 2111123231 is 1323211112.

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 2111123231 - 2²⁶ = 2044014367 is a prime.

It is a super-2 number, since 2×2111123231² = 8913682592935758722, 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 (2111125231) 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, 7936421 + ... + 7936686.

It is an arithmetic number, because the mean of its divisors is an integer number (317462160).

Almost surely, 2^2111123231 is an apocalyptic number.

2111123231 is a deficient number, since it is larger than the sum of its proper divisors (428574049).

2111123231 is a wasteful number, since it uses less digits than its factorization.

2111123231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15873133.

The product of its digits is 72, while the sum is 17.

The square root of 2111123231 is about 45946.9610638179. The cubic root of 2111123231 is about 1282.8361653370.

Adding to 2111123231 its reverse (1323211112), we get a palindrome (3434334343).

The spelling of 2111123231 in words is "two billion, one hundred eleven million, one hundred twenty-three thousand, two hundred thirty-one".