201331123 has 4 divisors (see below), whose sum is σ = 230092720. Its totient is φ = 172569528.

The previous prime is 201331111. The next prime is 201331133. The reversal of 201331123 is 321133102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321133102 = 2 ⋅160566551.

It is a cyclic number.

It is not a de Polignac number, because 201331123 - 2¹³ = 201322931 is a prime.

It is a super-2 number, since 2×201331123² = 81068442176882258, 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 = 201331097 and 201331106.

It is not an unprimeable number, because it can be changed into a prime (201331103) 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, 14380788 + ... + 14380801.

It is an arithmetic number, because the mean of its divisors is an integer number (57523180).

Almost surely, 2^201331123 is an apocalyptic number.

201331123 is a deficient number, since it is larger than the sum of its proper divisors (28761597).

201331123 is an equidigital number, since it uses as much as digits as its factorization.

201331123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28761596.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 201331123 is about 14189.1198810920. The cubic root of 201331123 is about 586.0980889746.

Adding to 201331123 its reverse (321133102), we get a palindrome (522464225).

The spelling of 201331123 in words is "two hundred one million, three hundred thirty-one thousand, one hundred twenty-three".