202023223123 has 4 divisors (see below), whose sum is σ = 212656024360. Its totient is φ = 191390421888.

The previous prime is 202023223117. The next prime is 202023223141. The reversal of 202023223123 is 321322320202.

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-202023223123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202023223094 and 202023223103.

It is not an unprimeable number, because it can be changed into a prime (202023233123) 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, 5316400590 + ... + 5316400627.

It is an arithmetic number, because the mean of its divisors is an integer number (53164006090).

Almost surely, 2^202023223123 is an apocalyptic number.

202023223123 is a deficient number, since it is larger than the sum of its proper divisors (10632801237).

202023223123 is a wasteful number, since it uses less digits than its factorization.

202023223123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10632801236.

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 202023223123 its reverse (321322320202), we get a palindrome (523345543325).

The spelling of 202023223123 in words is "two hundred two billion, twenty-three million, two hundred twenty-three thousand, one hundred twenty-three".