201212123 has 8 divisors (see below), whose sum is σ = 234849792. Its totient is φ = 168797736.

The previous prime is 201212117. The next prime is 201212159. The reversal of 201212123 is 321212102.

It is a happy number.

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 201212123 - 2⁴ = 201212107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201212098 and 201212107.

It is not an unprimeable number, because it can be changed into a prime (201212113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 305465 + ... + 306122.

It is an arithmetic number, because the mean of its divisors is an integer number (29356224).

Almost surely, 2^201212123 is an apocalyptic number.

201212123 is a deficient number, since it is larger than the sum of its proper divisors (33637669).

201212123 is an equidigital number, since it uses as much as digits as its factorization.

201212123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611641.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 201212123 is about 14184.9259074554. The cubic root of 201212123 is about 585.9825919806.

Adding to 201212123 its reverse (321212102), we get a palindrome (522424225).

The spelling of 201212123 in words is "two hundred one million, two hundred twelve thousand, one hundred twenty-three".