1117111111231 has 2 divisors, whose sum is σ = 1117111111232. Its totient is φ = 1117111111230.

The previous prime is 1117111111177. The next prime is 1117111111273. The reversal of 1117111111231 is 1321111117111.

It is a m-pointer prime, because the next prime (1117111111273) can be obtained adding 1117111111231 to its product of digits (42).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1117111111231 is a prime.

It is a super-2 number, since 2×1117111111231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1117111111631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 558555555615 + 558555555616.

It is an arithmetic number, because the mean of its divisors is an integer number (558555555616).

Almost surely, 2^{1117111111231} is an apocalyptic number.

1117111111231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1117111111231 is an equidigital number, since it uses as much as digits as its factorization.

1117111111231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42, while the sum is 22.

Adding to 1117111111231 its reverse (1321111117111), we get a palindrome (2438222228342).

The spelling of 1117111111231 in words is "one trillion, one hundred seventeen billion, one hundred eleven million, one hundred eleven thousand, two hundred thirty-one".