123312313221 has 8 divisors (see below), whose sum is σ = 164419336320. Its totient is φ = 82206749472.

The previous prime is 123312313219. The next prime is 123312313247. The reversal of 123312313221 is 122313213321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123312313221 - 2¹ = 123312313219 is a prime.

It is a super-2 number, since 2×123312313221² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123312313191 and 123312313200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123312318221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149520 + ... + 518633.

It is an arithmetic number, because the mean of its divisors is an integer number (20552417040).

Almost surely, 2^123312313221 is an apocalyptic number.

It is an amenable number.

123312313221 is a deficient number, since it is larger than the sum of its proper divisors (41107023099).

123312313221 is an equidigital number, since it uses as much as digits as its factorization.

123312313221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729675.

The product of its digits is 1296, while the sum is 24.

Adding to 123312313221 its reverse (122313213321), we get a palindrome (245625526542).

The spelling of 123312313221 in words is "one hundred twenty-three billion, three hundred twelve million, three hundred thirteen thousand, two hundred twenty-one".