311330221121 has 4 divisors (see below), whose sum is σ = 311392454832. Its totient is φ = 311267987412.

The previous prime is 311330221117. The next prime is 311330221171. The reversal of 311330221121 is 121122033113.

It is a happy number.

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 311330221121 - 2² = 311330221117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311330221093 and 311330221102.

It is not an unprimeable number, because it can be changed into a prime (311330221171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31109351 + ... + 31119356.

It is an arithmetic number, because the mean of its divisors is an integer number (77848113708).

Almost surely, 2^311330221121 is an apocalyptic number.

It is an amenable number.

311330221121 is a deficient number, since it is larger than the sum of its proper divisors (62233711).

311330221121 is an equidigital number, since it uses as much as digits as its factorization.

311330221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62233710.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 311330221121 its reverse (121122033113), we get a palindrome (432452254234).

The spelling of 311330221121 in words is "three hundred eleven billion, three hundred thirty million, two hundred twenty-one thousand, one hundred twenty-one".