201244123 has 4 divisors (see below), whose sum is σ = 202255600. Its totient is φ = 200232648.

The previous prime is 201244097. The next prime is 201244139. The reversal of 201244123 is 321442102.

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 201244123 - 2²¹ = 199146971 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 201244123.

It is not an unprimeable number, because it can be changed into a prime (201244163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505440 + ... + 505837.

It is an arithmetic number, because the mean of its divisors is an integer number (50563900).

Almost surely, 2^201244123 is an apocalyptic number.

201244123 is a deficient number, since it is larger than the sum of its proper divisors (1011477).

201244123 is a wasteful number, since it uses less digits than its factorization.

201244123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011476.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 201244123 is about 14186.0538205662. The cubic root of 201244123 is about 586.0136544711.

Adding to 201244123 its reverse (321442102), we get a palindrome (522686225).

The spelling of 201244123 in words is "two hundred one million, two hundred forty-four thousand, one hundred twenty-three".