311230511101 has 2 divisors, whose sum is σ = 311230511102. Its totient is φ = 311230511100.

The previous prime is 311230511099. The next prime is 311230511191. The reversal of 311230511101 is 101115032113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 303639571225 + 7590939876 = 551035^2 + 87126^2 .

It is a cyclic number.

It is not a de Polignac number, because 311230511101 - 2¹ = 311230511099 is a prime.

Together with 311230511099, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311230511191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155615255550 + 155615255551.

It is an arithmetic number, because the mean of its divisors is an integer number (155615255551).

Almost surely, 2^311230511101 is an apocalyptic number.

It is an amenable number.

311230511101 is a deficient number, since it is larger than the sum of its proper divisors (1).

311230511101 is an equidigital number, since it uses as much as digits as its factorization.

311230511101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 19.

Adding to 311230511101 its reverse (101115032113), we get a palindrome (412345543214).

The spelling of 311230511101 in words is "three hundred eleven billion, two hundred thirty million, five hundred eleven thousand, one hundred one".