11111242431 has 12 divisors (see below), whose sum is σ = 15487127768. Its totient is φ = 7085428944.

The previous prime is 11111242421. The next prime is 11111242447. The reversal of 11111242431 is 13424211111.

11111242431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11111242431 - 2⁶ = 11111242367 is a prime.

It is a super-2 number, since 2×11111242431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11111242398 and 11111242407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111242421) 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 in 11 ways as a sum of consecutive naturals, for example, 3499120 + ... + 3502293.

Almost surely, 2^11111242431 is an apocalyptic number.

11111242431 is a deficient number, since it is larger than the sum of its proper divisors (4375885337).

11111242431 is an equidigital number, since it uses as much as digits as its factorization.

11111242431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7001462 (or 7001439 counting only the distinct ones).

The product of its digits is 192, while the sum is 21.

Adding to 11111242431 its reverse (13424211111), we get a palindrome (24535453542).

The spelling of 11111242431 in words is "eleven billion, one hundred eleven million, two hundred forty-two thousand, four hundred thirty-one".