210121230323 has 4 divisors (see below), whose sum is σ = 210138698640. Its totient is φ = 210103762008.

The previous prime is 210121230317. The next prime is 210121230349. The reversal of 210121230323 is 323032121012.

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 210121230323 - 2⁶ = 210121230259 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210121230295 and 210121230304.

It is not an unprimeable number, because it can be changed into a prime (210121230353) 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, 8716103 + ... + 8740176.

It is an arithmetic number, because the mean of its divisors is an integer number (52534674660).

Almost surely, 2^210121230323 is an apocalyptic number.

210121230323 is a deficient number, since it is larger than the sum of its proper divisors (17468317).

210121230323 is a wasteful number, since it uses less digits than its factorization.

210121230323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17468316.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 210121230323 its reverse (323032121012), we get a palindrome (533153351335).

The spelling of 210121230323 in words is "two hundred ten billion, one hundred twenty-one million, two hundred thirty thousand, three hundred twenty-three".