3131321111 has 2 divisors, whose sum is σ = 3131321112. Its totient is φ = 3131321110.

The previous prime is 3131321051. The next prime is 3131321159. The reversal of 3131321111 is 1111231313.

3131321111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (1111231313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3131321111 - 2¹⁴ = 3131304727 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3131321111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3131321911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1565660555 + 1565660556.

It is an arithmetic number, because the mean of its divisors is an integer number (1565660556).

Almost surely, 2^3131321111 is an apocalyptic number.

3131321111 is a deficient number, since it is larger than the sum of its proper divisors (1).

3131321111 is an equidigital number, since it uses as much as digits as its factorization.

3131321111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54, while the sum is 17.

The square root of 3131321111 is about 55958.2086114272. The cubic root of 3131321111 is about 1462.9939673705.

Adding to 3131321111 its reverse (1111231313), we get a palindrome (4242552424).

The spelling of 3131321111 in words is "three billion, one hundred thirty-one million, three hundred twenty-one thousand, one hundred eleven".