11111242000 has 80 divisors (see below), whose sum is σ = 27114001200. Its totient is φ = 4403635200.

The previous prime is 11111241989. The next prime is 11111242001. The reversal of 11111242000 is 24211111.

It can be written as a sum of positive squares in 8 ways, for example, as 4593586176 + 6517655824 = 67776^2 + 80732^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (11111242001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192516 + ... + 243484.

It is an arithmetic number, because the mean of its divisors is an integer number (338925015).

Almost surely, 2^11111242000 is an apocalyptic number.

11111242000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11111242000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13557000600).

11111242000 is an abundant number, since it is smaller than the sum of its proper divisors (16002759200).

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

11111242000 is a wasteful number, since it uses less digits than its factorization.

11111242000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51101 (or 51085 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 11111242000 its reverse (24211111), we get a palindrome (11135453111).

The spelling of 11111242000 in words is "eleven billion, one hundred eleven million, two hundred forty-two thousand".