201123126 has 36 divisors (see below), whose sum is σ = 446210388. Its totient is φ = 65471112.

The previous prime is 201123101. The next prime is 201123127. The reversal of 201123126 is 621321102.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 201123099 and 201123108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201123127) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 30261 + ... + 36303.

It is an arithmetic number, because the mean of its divisors is an integer number (12394733).

Almost surely, 2^201123126 is an apocalyptic number.

201123126 is an abundant number, since it is smaller than the sum of its proper divisors (245087262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201123126 is a wasteful number, since it uses less digits than its factorization.

201123126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6137 (or 6091 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 201123126 is about 14181.7885331858. The cubic root of 201123126 is about 585.8961850208.

Adding to 201123126 its reverse (621321102), we get a palindrome (822444228).

The spelling of 201123126 in words is "two hundred one million, one hundred twenty-three thousand, one hundred twenty-six".