123321120111001 has 4 divisors (see below), whose sum is σ = 125944973730432. Its totient is φ = 120697266491572.

The previous prime is 123321120110939. The next prime is 123321120111041. The reversal of 123321120111001 is 100111021123321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123321120111001 - 2¹⁹ = 123321119586713 is a prime.

It is a super-2 number, since 2×123321120111001² (a number of 29 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 123321120111001.

It is not an unprimeable number, because it can be changed into a prime (123321120111041) 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, 1311926809645 + ... + 1311926809738.

It is an arithmetic number, because the mean of its divisors is an integer number (31486243432608).

Almost surely, 2^{123321120111001} is an apocalyptic number.

It is an amenable number.

123321120111001 is a deficient number, since it is larger than the sum of its proper divisors (2623853619431).

123321120111001 is an equidigital number, since it uses as much as digits as its factorization.

123321120111001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2623853619430.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 123321120111001 its reverse (100111021123321), we get a palindrome (223432141234322).

The spelling of 123321120111001 in words is "one hundred twenty-three trillion, three hundred twenty-one billion, one hundred twenty million, one hundred eleven thousand, one".