201123331 has 4 divisors (see below), whose sum is σ = 201358872.
Its totient is φ = 200887792.
The previous prime is 201123313. The next prime is 201123337. The reversal of 201123331 is 133321102.
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 201123331 - 29 = 201122819 is a prime.
It is a super-2 number, since 2×2011233312 = 80901188545071122, which contains 22 as substring.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (201123337) 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, 116485 + ... + 118198.
It is an arithmetic number, because the mean of its divisors is an integer number (50339718).
Almost surely, 2201123331 is an apocalyptic number.
201123331 is a deficient number, since it is larger than the sum of its proper divisors (235541).
201123331 is an equidigital number, since it uses as much as digits as its factorization.
201123331 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 235540.
The product of its (nonzero) digits is 108, while the sum is 16.
The square root of 201123331 is about 14181.7957607632.
The cubic root of 201123331 is about 585.8963840840.
Adding to 201123331 its reverse (133321102), we get a palindrome (334444433).
The spelling of 201123331 in words is "two hundred one million, one hundred twenty-three thousand, three hundred thirty-one".