311321300121331 has 4 divisors (see below), whose sum is σ = 313772648941312. Its totient is φ = 308869951301352.

The previous prime is 311321300121313. The next prime is 311321300121421. The reversal of 311321300121331 is 133121003123113.

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

It is a cyclic number.

It is not a de Polignac number, because 311321300121331 - 2⁹ = 311321300120819 is a prime.

It is a super-2 number, since 2×311321300121331² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311321300121296 and 311321300121305.

It is not an unprimeable number, because it can be changed into a prime (311321300121731) 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 in 3 ways as a sum of consecutive naturals, for example, 1225674409800 + ... + 1225674410053.

It is an arithmetic number, because the mean of its divisors is an integer number (78443162235328).

Almost surely, 2^{311321300121331} is an apocalyptic number.

311321300121331 is a deficient number, since it is larger than the sum of its proper divisors (2451348819981).

311321300121331 is a wasteful number, since it uses less digits than its factorization.

311321300121331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2451348819980.

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 311321300121331 its reverse (133121003123113), we get a palindrome (444442303244444).

The spelling of 311321300121331 in words is "three hundred eleven trillion, three hundred twenty-one billion, three hundred million, one hundred twenty-one thousand, three hundred thirty-one".