3111011431321 has 2 divisors, whose sum is σ = 3111011431322. Its totient is φ = 3111011431320.

The previous prime is 3111011431301. The next prime is 3111011431351. The reversal of 3111011431321 is 1231341101113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2108199457296 + 1002811974025 = 1451964^2 + 1001405^2 .

It is a cyclic number.

It is not a de Polignac number, because 3111011431321 - 2²⁷ = 3110877213593 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3111011431292 and 3111011431301.

It is not a weakly prime, because it can be changed into another prime (3111011431301) 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, 1555505715660 + 1555505715661.

It is an arithmetic number, because the mean of its divisors is an integer number (1555505715661).

Almost surely, 2^{3111011431321} is an apocalyptic number.

It is an amenable number.

3111011431321 is a deficient number, since it is larger than the sum of its proper divisors (1).

3111011431321 is an equidigital number, since it uses as much as digits as its factorization.

3111011431321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 3111011431321 its reverse (1231341101113), we get a palindrome (4342352532434).

The spelling of 3111011431321 in words is "three trillion, one hundred eleven billion, eleven million, four hundred thirty-one thousand, three hundred twenty-one".