11112443121 has 8 divisors (see below), whose sum is σ = 15956328640. Its totient is φ = 6838426512.

The previous prime is 11112443101. The next prime is 11112443149. The reversal of 11112443121 is 12134421111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11112443121 - 2¹³ = 11112434929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11112443101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142467181 + ... + 142467258.

It is an arithmetic number, because the mean of its divisors is an integer number (1994541080).

Almost surely, 2^11112443121 is an apocalyptic number.

It is an amenable number.

11112443121 is a deficient number, since it is larger than the sum of its proper divisors (4843885519).

11112443121 is a wasteful number, since it uses less digits than its factorization.

11112443121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284934455.

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

Adding to 11112443121 its reverse (12134421111), we get a palindrome (23246864232).

The spelling of 11112443121 in words is "eleven billion, one hundred twelve million, four hundred forty-three thousand, one hundred twenty-one".