201002123 has 4 divisors (see below), whose sum is σ = 229716720. Its totient is φ = 172287528.

The previous prime is 201002111. The next prime is 201002141. The reversal of 201002123 is 321200102.

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: 321200102 = 2 ⋅160600051.

It is not a de Polignac number, because 201002123 - 2²⁶ = 133893259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201002323) 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, 14357288 + ... + 14357301.

It is an arithmetic number, because the mean of its divisors is an integer number (57429180).

Almost surely, 2^201002123 is an apocalyptic number.

201002123 is a deficient number, since it is larger than the sum of its proper divisors (28714597).

201002123 is an equidigital number, since it uses as much as digits as its factorization.

201002123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28714596.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 201002123 is about 14177.5217509972. The cubic root of 201002123 is about 585.7786626189.

Adding to 201002123 its reverse (321200102), we get a palindrome (522202225).

The spelling of 201002123 in words is "two hundred one million, two thousand, one hundred twenty-three".