231222111 has 8 divisors (see below), whose sum is σ = 309137664. Its totient is φ = 153727320.

The previous prime is 231222107. The next prime is 231222119. The reversal of 231222111 is 111222132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 231222111 - 2² = 231222107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231222119) 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, 103905 + ... + 106106.

It is an arithmetic number, because the mean of its divisors is an integer number (38642208).

Almost surely, 2^231222111 is an apocalyptic number.

231222111 is a deficient number, since it is larger than the sum of its proper divisors (77915553).

231222111 is a wasteful number, since it uses less digits than its factorization.

231222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210381.

The product of its digits is 48, while the sum is 15.

The square root of 231222111 is about 15205.9893134252. The cubic root of 231222111 is about 613.7758371022.

Adding to 231222111 its reverse (111222132), we get a palindrome (342444243).

The spelling of 231222111 in words is "two hundred thirty-one million, two hundred twenty-two thousand, one hundred eleven".