201123143 has 8 divisors (see below), whose sum is σ = 217543200. Its totient is φ = 184838688.

The previous prime is 201123137. The next prime is 201123187. The reversal of 201123143 is 341321102.

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 201123143 - 2⁴ = 201123127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201125143) 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, 30803 + ... + 36756.

It is an arithmetic number, because the mean of its divisors is an integer number (27192900).

Almost surely, 2^201123143 is an apocalyptic number.

201123143 is a deficient number, since it is larger than the sum of its proper divisors (16420057).

201123143 is a wasteful number, since it uses less digits than its factorization.

201123143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67801.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 201123143 is about 14181.7891325460. The cubic root of 201123143 is about 585.8962015285.

Adding to 201123143 its reverse (341321102), we get a palindrome (542444245).

The spelling of 201123143 in words is "two hundred one million, one hundred twenty-three thousand, one hundred forty-three".