203201123 has 4 divisors (see below), whose sum is σ = 203684208. Its totient is φ = 202718040.

The previous prime is 203201111. The next prime is 203201147. The reversal of 203201123 is 321102302.

It is a happy number.

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 203201123 - 2⁴ = 203201107 is a prime.

It is a super-2 number, since 2×203201123² = 82581392776922258, 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 = 203201098 and 203201107.

It is not an unprimeable number, because it can be changed into a prime (203201023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240911 + ... + 241752.

It is an arithmetic number, because the mean of its divisors is an integer number (50921052).

Almost surely, 2^203201123 is an apocalyptic number.

203201123 is a deficient number, since it is larger than the sum of its proper divisors (483085).

203201123 is an equidigital number, since it uses as much as digits as its factorization.

203201123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483084.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 203201123 is about 14254.8631350848. The cubic root of 203201123 is about 587.9070948207.

Adding to 203201123 its reverse (321102302), we get a palindrome (524303425).

The spelling of 203201123 in words is "two hundred three million, two hundred one thousand, one hundred twenty-three".