202123 has 4 divisors (see below), whose sum is σ = 204120. Its totient is φ = 200128.

The previous prime is 202121. The next prime is 202127. The reversal of 202123 is 321202.

202123 is nontrivially palindromic in base 14.

202123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 202123 - 2¹ = 202121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202121) 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, 838 + ... + 1051.

It is an arithmetic number, because the mean of its divisors is an integer number (51030).

2²⁰²¹²³ is an apocalyptic number.

202123 is a deficient number, since it is larger than the sum of its proper divisors (1997).

202123 is a wasteful number, since it uses less digits than its factorization.

202123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1996.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 202123 is about 449.5809159651. The cubic root of 202123 is about 58.6865498778.

Adding to 202123 its reverse (321202), we get a palindrome (523325).

It can be divided in two parts, 202 and 123, that added together give a triangular number (325 = T₂₅).

The spelling of 202123 in words is "two hundred two thousand, one hundred twenty-three", and thus it is an iban number.