201145123 has 8 divisors (see below), whose sum is σ = 205387488. Its totient is φ = 196919424.

The previous prime is 201145111. The next prime is 201145151. The reversal of 201145123 is 321541102.

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

It is not a de Polignac number, because 201145123 - 2¹³ = 201136931 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201145123.

It is not an unprimeable number, because it can be changed into a prime (201145163) 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, 21915 + ... + 29707.

It is an arithmetic number, because the mean of its divisors is an integer number (25673436).

Almost surely, 2^201145123 is an apocalyptic number.

201145123 is a deficient number, since it is larger than the sum of its proper divisors (4242365).

201145123 is an equidigital number, since it uses as much as digits as its factorization.

201145123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8333.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 201145123 is about 14182.5640488594. The cubic root of 201145123 is about 585.9175442230.

Adding to 201145123 its reverse (321541102), we get a palindrome (522686225).

The spelling of 201145123 in words is "two hundred one million, one hundred forty-five thousand, one hundred twenty-three".