201146123 has 4 divisors (see below), whose sum is σ = 206052168. Its totient is φ = 196240080.

The previous prime is 201146119. The next prime is 201146161. The reversal of 201146123 is 321641102.

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 201146123 - 2² = 201146119 is a prime.

It is a super-2 number, since 2×201146123² = 80919525595862258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201146095 and 201146104.

It is not an unprimeable number, because it can be changed into a prime (201146923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2452961 + ... + 2453042.

It is an arithmetic number, because the mean of its divisors is an integer number (51513042).

Almost surely, 2^201146123 is an apocalyptic number.

201146123 is a deficient number, since it is larger than the sum of its proper divisors (4906045).

201146123 is an equidigital number, since it uses as much as digits as its factorization.

201146123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4906044.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 201146123 is about 14182.5993033717. The cubic root of 201146123 is about 585.9185151912.

Adding to 201146123 its reverse (321641102), we get a palindrome (522787225).

The spelling of 201146123 in words is "two hundred one million, one hundred forty-six thousand, one hundred twenty-three".