1111320231431 has 2 divisors, whose sum is σ = 1111320231432. Its totient is φ = 1111320231430.

The previous prime is 1111320231341. The next prime is 1111320231449. The reversal of 1111320231431 is 1341320231111.

Together with previous prime (1111320231341) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111320231431 is a prime.

It is a super-3 number, since 3×1111320231431³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 1111320231397 and 1111320231406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111320231451) 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, 555660115715 + 555660115716.

It is an arithmetic number, because the mean of its divisors is an integer number (555660115716).

Almost surely, 2^{1111320231431} is an apocalyptic number.

1111320231431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111320231431 is an equidigital number, since it uses as much as digits as its factorization.

1111320231431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 1111320231431 its reverse (1341320231111), we get a palindrome (2452640462542).

The spelling of 1111320231431 in words is "one trillion, one hundred eleven billion, three hundred twenty million, two hundred thirty-one thousand, four hundred thirty-one".