311323331001331 has 4 divisors (see below), whose sum is σ = 339625452001464. Its totient is φ = 283021210001200.

The previous prime is 311323331001323. The next prime is 311323331001401. The reversal of 311323331001331 is 133100133323113.

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

It is not a de Polignac number, because 311323331001331 - 2³ = 311323331001323 is a prime.

It is a super-2 number, since 2×311323331001331² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 311323331001331.

It is not an unprimeable number, because it can be changed into a prime (311323331001131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14151060500050 + ... + 14151060500071.

It is an arithmetic number, because the mean of its divisors is an integer number (84906363000366).

Almost surely, 2^{311323331001331} is an apocalyptic number.

311323331001331 is a deficient number, since it is larger than the sum of its proper divisors (28302121000133).

311323331001331 is a wasteful number, since it uses less digits than its factorization.

311323331001331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28302121000132.

The product of its (nonzero) digits is 4374, while the sum is 28.

Adding to 311323331001331 its reverse (133100133323113), we get a palindrome (444423464324444).

The spelling of 311323331001331 in words is "three hundred eleven trillion, three hundred twenty-three billion, three hundred thirty-one million, one thousand, three hundred thirty-one".