201123240203 has 16 divisors (see below), whose sum is σ = 209397182400. Its totient is φ = 193022054400.

The previous prime is 201123240191. The next prime is 201123240233. The reversal of 201123240203 is 302042321102.

201123240203 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 201123240203 - 2¹² = 201123236107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201123240233) 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 15 ways as a sum of consecutive naturals, for example, 1230101 + ... + 1383977.

It is an arithmetic number, because the mean of its divisors is an integer number (13087323900).

Almost surely, 2^201123240203 is an apocalyptic number.

201123240203 is a deficient number, since it is larger than the sum of its proper divisors (8273942197).

201123240203 is a wasteful number, since it uses less digits than its factorization.

201123240203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154438.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 201123240203 its reverse (302042321102), we get a palindrome (503165561305).

The spelling of 201123240203 in words is "two hundred one billion, one hundred twenty-three million, two hundred forty thousand, two hundred three".