311320222121 has 8 divisors (see below), whose sum is σ = 316975141344. Its totient is φ = 305702877600.

The previous prime is 311320222091. The next prime is 311320222123. The reversal of 311320222121 is 121222023113.

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

It is a cyclic number.

It is not a de Polignac number, because 311320222121 - 2²² = 311316027817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311320222093 and 311320222102.

It is not an unprimeable number, because it can be changed into a prime (311320222123) 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 7 ways as a sum of consecutive naturals, for example, 9376955 + ... + 9410096.

It is an arithmetic number, because the mean of its divisors is an integer number (39621892668).

Almost surely, 2^311320222121 is an apocalyptic number.

It is an amenable number.

311320222121 is a deficient number, since it is larger than the sum of its proper divisors (5654919223).

311320222121 is a wasteful number, since it uses less digits than its factorization.

311320222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18787351.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 311320222121 its reverse (121222023113), we get a palindrome (432542245234).

The spelling of 311320222121 in words is "three hundred eleven billion, three hundred twenty million, two hundred twenty-two thousand, one hundred twenty-one".