201111231 has 8 divisors (see below), whose sum is σ = 270260224. Its totient is φ = 133018200.

The previous prime is 201111227. The next prime is 201111247. The reversal of 201111231 is 132111102.

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

It is not a de Polignac number, because 201111231 - 2² = 201111227 is a prime.

It is a super-2 number, since 2×201111231² = 80891454468670722, 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 (201111221) 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, 263545 + ... + 264306.

It is an arithmetic number, because the mean of its divisors is an integer number (33782528).

Almost surely, 2^201111231 is an apocalyptic number.

201111231 is a deficient number, since it is larger than the sum of its proper divisors (69148993).

201111231 is a wasteful number, since it uses less digits than its factorization.

201111231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527981.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 201111231 is about 14181.3691511081. The cubic root of 201111231 is about 585.8846342647.

Adding to 201111231 its reverse (132111102), we get a palindrome (333222333).

The spelling of 201111231 in words is "two hundred one million, one hundred eleven thousand, two hundred thirty-one".