11111311242 has 20 divisors (see below), whose sum is σ = 24897568146. Its totient is φ = 3703770360.

The previous prime is 11111311229. The next prime is 11111311243. The reversal of 11111311242 is 24211311111.

11111311242 is a `hidden beast` number, since 1 + 1 + 111 + 311 + 242 = 666.

It can be written as a sum of positive squares in only one way, i.e., 9763613721 + 1347697521 = 98811^2 + 36711^2 .

It is a super-2 number, since 2×11111311242² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (11111311243) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 34294009 + ... + 34294332.

Almost surely, 2^11111311242 is an apocalyptic number.

11111311242 is an abundant number, since it is smaller than the sum of its proper divisors (13786256904).

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

11111311242 is an equidigital number, since it uses as much as digits as its factorization.

11111311242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68588355 (or 68588346 counting only the distinct ones).

The product of its digits is 48, while the sum is 18.

Adding to 11111311242 its reverse (24211311111), we get a palindrome (35322622353).

The spelling of 11111311242 in words is "eleven billion, one hundred eleven million, three hundred eleven thousand, two hundred forty-two".