311313121111001 has 4 divisors (see below), whose sum is σ = 311381556622500. Its totient is φ = 311244685599504.

The previous prime is 311313121110899. The next prime is 311313121111021. The reversal of 311313121111001 is 100111121313113.

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 266791879075225 + 44521242035776 = 16333765^2 + 6672424^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311313121111001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311313121111021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34217748926 + ... + 34217758023.

It is an arithmetic number, because the mean of its divisors is an integer number (77845389155625).

Almost surely, 2^{311313121111001} is an apocalyptic number.

It is an amenable number.

311313121111001 is a deficient number, since it is larger than the sum of its proper divisors (68435511499).

311313121111001 is an equidigital number, since it uses as much as digits as its factorization.

311313121111001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68435511498.

The product of its (nonzero) digits is 54, while the sum is 20.

Adding to 311313121111001 its reverse (100111121313113), we get a palindrome (411424242424114).

The spelling of 311313121111001 in words is "three hundred eleven trillion, three hundred thirteen billion, one hundred twenty-one million, one hundred eleven thousand, one".