2111223231 has 16 divisors (see below), whose sum is σ = 3368333920. Its totient is φ = 1299214080.

The previous prime is 2111223203. The next prime is 2111223271. The reversal of 2111223231 is 1323221112.

2111223231 is a `hidden beast` number, since 211 + 1 + 223 + 231 = 666.

It is not a de Polignac number, because 2111223231 - 2⁹ = 2111222719 is a prime.

It is a super-2 number, since 2×2111223231² = 8914527062228158722, 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 (2111223271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3007090 + ... + 3007791.

It is an arithmetic number, because the mean of its divisors is an integer number (210520870).

Almost surely, 2^2111223231 is an apocalyptic number.

2111223231 is a deficient number, since it is larger than the sum of its proper divisors (1257110689).

2111223231 is a wasteful number, since it uses less digits than its factorization.

2111223231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6014903 (or 6014897 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 2111223231 is about 45948.0492621830. The cubic root of 2111223231 is about 1282.8564202088.

Adding to 2111223231 its reverse (1323221112), we get a palindrome (3434444343).

The spelling of 2111223231 in words is "two billion, one hundred eleven million, two hundred twenty-three thousand, two hundred thirty-one".