201122123 has 4 divisors (see below), whose sum is σ = 201305568. Its totient is φ = 200938680.

The previous prime is 201122101. The next prime is 201122161. The reversal of 201122123 is 321221102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321221102 = 2 ⋅160610551.

It is a cyclic number.

It is not a de Polignac number, because 201122123 - 2¹⁸ = 200859979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201122098 and 201122107.

It is not an unprimeable number, because it can be changed into a prime (201122183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90068 + ... + 92273.

It is an arithmetic number, because the mean of its divisors is an integer number (50326392).

Almost surely, 2^201122123 is an apocalyptic number.

201122123 is a deficient number, since it is larger than the sum of its proper divisors (183445).

201122123 is a wasteful number, since it uses less digits than its factorization.

201122123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183444.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 201122123 is about 14181.7531708883. The cubic root of 201122123 is about 585.8952110654.

Adding to 201122123 its reverse (321221102), we get a palindrome (522343225).

The spelling of 201122123 in words is "two hundred one million, one hundred twenty-two thousand, one hundred twenty-three".