202123101 has 8 divisors (see below), whose sum is σ = 270121600. Its totient is φ = 134436672.

The previous prime is 202123093. The next prime is 202123111. The reversal of 202123101 is 101321202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 202123101 - 2³ = 202123093 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202123111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76501 + ... + 79098.

It is an arithmetic number, because the mean of its divisors is an integer number (33765200).

Almost surely, 2^202123101 is an apocalyptic number.

It is an amenable number.

202123101 is a deficient number, since it is larger than the sum of its proper divisors (67998499).

202123101 is a wasteful number, since it uses less digits than its factorization.

202123101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156035.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 202123101 is about 14217.0004220300. Note that the first 3 decimals coincide. The cubic root of 202123101 is about 586.8655965290.

Subtracting from 202123101 its sum of digits (12), we obtain a square (202123089 = 14217²).

Adding to 202123101 its reverse (101321202), we get a palindrome (303444303).

The spelling of 202123101 in words is "two hundred two million, one hundred twenty-three thousand, one hundred one".