1173111131 has 2 divisors, whose sum is σ = 1173111132. Its totient is φ = 1173111130.

The previous prime is 1173111109. The next prime is 1173111139. The reversal of 1173111131 is 1311113711.

It is a strong prime.

It is an emirp because it is prime and its reverse (1311113711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1173111131 - 2¹⁸ = 1172848987 is a prime.

It is a super-2 number, since 2×1173111131² = 2752379451352198322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1173111139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 586555565 + 586555566.

It is an arithmetic number, because the mean of its divisors is an integer number (586555566).

Almost surely, 2^1173111131 is an apocalyptic number.

1173111131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1173111131 is an equidigital number, since it uses as much as digits as its factorization.

1173111131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63, while the sum is 20.

The square root of 1173111131 is about 34250.7099342481. The cubic root of 1173111131 is about 1054.6614011887.

Adding to 1173111131 its reverse (1311113711), we get a palindrome (2484224842).

The spelling of 1173111131 in words is "one billion, one hundred seventy-three million, one hundred eleven thousand, one hundred thirty-one".