210312231123 has 4 divisors (see below), whose sum is σ = 280416308168. Its totient is φ = 140208154080.

The previous prime is 210312231119. The next prime is 210312231137. The reversal of 210312231123 is 321132213012.

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

It is not a de Polignac number, because 210312231123 - 2² = 210312231119 is a prime.

It is a super-2 number, since 2×210312231123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210312231123.

It is not an unprimeable number, because it can be changed into a prime (210312231113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35052038518 + ... + 35052038523.

It is an arithmetic number, because the mean of its divisors is an integer number (70104077042).

Almost surely, 2^210312231123 is an apocalyptic number.

210312231123 is a deficient number, since it is larger than the sum of its proper divisors (70104077045).

210312231123 is an equidigital number, since it uses as much as digits as its factorization.

210312231123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70104077044.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 210312231123 its reverse (321132213012), we get a palindrome (531444444135).

The spelling of 210312231123 in words is "two hundred ten billion, three hundred twelve million, two hundred thirty-one thousand, one hundred twenty-three".