311221011211 has 8 divisors (see below), whose sum is σ = 347794656048. Its totient is φ = 276027504000.

The previous prime is 311221011163. The next prime is 311221011349. The reversal of 311221011211 is 112110122113.

It is a happy number.

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 311221011211 - 2¹³ = 311221003019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311221011011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345033930 + ... + 345034831.

It is an arithmetic number, because the mean of its divisors is an integer number (43474332006).

Almost surely, 2^311221011211 is an apocalyptic number.

311221011211 is a deficient number, since it is larger than the sum of its proper divisors (36573644837).

311221011211 is a wasteful number, since it uses less digits than its factorization.

311221011211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690068813.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 311221011211 its reverse (112110122113), we get a palindrome (423331133324).

The spelling of 311221011211 in words is "three hundred eleven billion, two hundred twenty-one million, eleven thousand, two hundred eleven".