202312123 has 4 divisors (see below), whose sum is σ = 217874608. Its totient is φ = 186749640.

The previous prime is 202312093. The next prime is 202312139. The reversal of 202312123 is 321213202.

202312123 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 a de Polignac number, because none of the positive numbers 2^k-202312123 is a prime.

It is a super-2 number, since 2×202312123² = 81860390225534258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202312097 and 202312106.

It is not an unprimeable number, because it can be changed into a prime (202312193) 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, 7781223 + ... + 7781248.

It is an arithmetic number, because the mean of its divisors is an integer number (54468652).

Almost surely, 2^202312123 is an apocalyptic number.

202312123 is a deficient number, since it is larger than the sum of its proper divisors (15562485).

202312123 is a wasteful number, since it uses less digits than its factorization.

202312123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15562484.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 202312123 is about 14223.6466140016. The cubic root of 202312123 is about 587.0484816884.

Adding to 202312123 its reverse (321213202), we get a palindrome (523525325).

The spelling of 202312123 in words is "two hundred two million, three hundred twelve thousand, one hundred twenty-three".