311220011101 has 4 divisors (see below), whose sum is σ = 311228113852. Its totient is φ = 311211908352.

The previous prime is 311220011099. The next prime is 311220011203. The reversal of 311220011101 is 101110022113.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 144323250201 + 166896760900 = 379899^2 + 408530^2 .

It is a cyclic number.

It is not a de Polignac number, because 311220011101 - 2¹ = 311220011099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311220081101) 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, 3993486 + ... + 4070671.

It is an arithmetic number, because the mean of its divisors is an integer number (77807028463).

Almost surely, 2^311220011101 is an apocalyptic number.

It is an amenable number.

311220011101 is a deficient number, since it is larger than the sum of its proper divisors (8102751).

311220011101 is an equidigital number, since it uses as much as digits as its factorization.

311220011101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8102750.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 311220011101 its reverse (101110022113), we get a palindrome (412330033214).

The spelling of 311220011101 in words is "three hundred eleven billion, two hundred twenty million, eleven thousand, one hundred one".