11171311111242 has 48 divisors (see below), whose sum is σ = 24748665701760. Its totient is φ = 3640978757376.

The previous prime is 11171311111241. The next prime is 11171311111409. The reversal of 11171311111242 is 24211111317111.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (11171311111241) 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 23 ways as a sum of consecutive naturals, for example, 38398642 + ... + 38688477.

It is an arithmetic number, because the mean of its divisors is an integer number (515597202120).

Almost surely, 2^{11171311111242} is an apocalyptic number.

11171311111242 is an abundant number, since it is smaller than the sum of its proper divisors (13577354590518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11171311111242 is a wasteful number, since it uses less digits than its factorization.

11171311111242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77087307 (or 77087304 counting only the distinct ones).

The product of its digits is 336, while the sum is 27.

Adding to 11171311111242 its reverse (24211111317111), we get a palindrome (35382422428353).

The spelling of 11171311111242 in words is "eleven trillion, one hundred seventy-one billion, three hundred eleven million, one hundred eleven thousand, two hundred forty-two".