123211221323 has 4 divisors (see below), whose sum is σ = 123248550048. Its totient is φ = 123173892600.

The previous prime is 123211221271. The next prime is 123211221347. The reversal of 123211221323 is 323122112321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 323122112321 = 313 ⋅1032339017.

It is a cyclic number.

It is not a de Polignac number, because 123211221323 - 2¹⁰ = 123211220299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123211226323) 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, 18659411 + ... + 18666012.

It is an arithmetic number, because the mean of its divisors is an integer number (30812137512).

Almost surely, 2^123211221323 is an apocalyptic number.

123211221323 is a deficient number, since it is larger than the sum of its proper divisors (37328725).

123211221323 is an equidigital number, since it uses as much as digits as its factorization.

123211221323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37328724.

The product of its digits is 864, while the sum is 23.

Adding to 123211221323 its reverse (323122112321), we get a palindrome (446333333644).

The spelling of 123211221323 in words is "one hundred twenty-three billion, two hundred eleven million, two hundred twenty-one thousand, three hundred twenty-three".