313211123321 has 4 divisors (see below), whose sum is σ = 326828998272. Its totient is φ = 299593248372.

The previous prime is 313211123287. The next prime is 313211123363. The reversal of 313211123321 is 123321112313.

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, and also an emirpimes, since its reverse is a distinct semiprime: 123321112313 = 7 ⋅17617301759.

It is a cyclic number.

It is not a de Polignac number, because 313211123321 - 2¹⁰ = 313211122297 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 13617874927 = 313211123321 / (3 + 1 + 3 + 2 + 1 + 1 + 1 + 2 + 3 + 3 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (313211123371) 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, 6808937441 + ... + 6808937486.

It is an arithmetic number, because the mean of its divisors is an integer number (81707249568).

Almost surely, 2^313211123321 is an apocalyptic number.

It is an amenable number.

313211123321 is a deficient number, since it is larger than the sum of its proper divisors (13617874951).

313211123321 is a wasteful number, since it uses less digits than its factorization.

313211123321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13617874950.

The product of its digits is 648, while the sum is 23.

Adding to 313211123321 its reverse (123321112313), we get a palindrome (436532235634).

The spelling of 313211123321 in words is "three hundred thirteen billion, two hundred eleven million, one hundred twenty-three thousand, three hundred twenty-one".