123211231210321 has 4 divisors (see below), whose sum is σ = 123254722646692. Its totient is φ = 123167739773952.

The previous prime is 123211231210267. The next prime is 123211231210373. The reversal of 123211231210321 is 123012132112321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 53444302134721 + 69766929075600 = 7310561^2 + 8352660^2 .

It is a cyclic number.

It is not a de Polignac number, because 123211231210321 - 2⁹ = 123211231209809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123211231510321) 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, 21745713936 + ... + 21745719601.

It is an arithmetic number, because the mean of its divisors is an integer number (30813680661673).

Almost surely, 2^{123211231210321} is an apocalyptic number.

It is an amenable number.

123211231210321 is a deficient number, since it is larger than the sum of its proper divisors (43491436371).

123211231210321 is an equidigital number, since it uses as much as digits as its factorization.

123211231210321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43491436370.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 123211231210321 its reverse (123012132112321), we get a palindrome (246223363322642).

The spelling of 123211231210321 in words is "one hundred twenty-three trillion, two hundred eleven billion, two hundred thirty-one million, two hundred ten thousand, three hundred twenty-one".