11112111121011 has 8 divisors (see below), whose sum is σ = 14855240902080. Its totient is φ = 7388527710312.

The previous prime is 11112111120989. The next prime is 11112111121019. The reversal of 11112111121011 is 11012111121111.

It is a happy number.

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

It is not a de Polignac number, because 11112111121011 - 2¹⁰ = 11112111119987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11112111121019) 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, 4886591265 + ... + 4886593538.

It is an arithmetic number, because the mean of its divisors is an integer number (1856905112760).

Almost surely, 2^{11112111121011} is an apocalyptic number.

11112111121011 is a deficient number, since it is larger than the sum of its proper divisors (3743129781069).

11112111121011 is an equidigital number, since it uses as much as digits as its factorization.

11112111121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9773185185.

The product of its (nonzero) digits is 4, while the sum is 15.

Adding to 11112111121011 its reverse (11012111121111), we get a palindrome (22124222242122).

The spelling of 11112111121011 in words is "eleven trillion, one hundred twelve billion, one hundred eleven million, one hundred twenty-one thousand, eleven".