123311324221 has 4 divisors (see below), whose sum is σ = 124049715552. Its totient is φ = 122572932892.

The previous prime is 123311324189. The next prime is 123311324237. The reversal of 123311324221 is 122423113321.

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 123311324221 - 2⁵ = 123311324189 is a prime.

It is a super-2 number, since 2×123311324221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123311324291) 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, 369195415 + ... + 369195748.

It is an arithmetic number, because the mean of its divisors is an integer number (31012428888).

Almost surely, 2^123311324221 is an apocalyptic number.

It is an amenable number.

123311324221 is a deficient number, since it is larger than the sum of its proper divisors (738391331).

123311324221 is an equidigital number, since it uses as much as digits as its factorization.

123311324221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738391330.

The product of its digits is 1728, while the sum is 25.

Adding to 123311324221 its reverse (122423113321), we get a palindrome (245734437542).

The spelling of 123311324221 in words is "one hundred twenty-three billion, three hundred eleven million, three hundred twenty-four thousand, two hundred twenty-one".