11112110012221 has 4 divisors (see below), whose sum is σ = 11117271235932. Its totient is φ = 11106948788512.

The previous prime is 11112110012219. The next prime is 11112110012249. The reversal of 11112110012221 is 12221001121111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4119840408121 + 6992269604100 = 2029739^2 + 2644290^2 .

It is a cyclic number.

It is not a de Polignac number, because 11112110012221 - 2¹ = 11112110012219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11112110012195 and 11112110012204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11112110012291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2580608626 + ... + 2580612931.

It is an arithmetic number, because the mean of its divisors is an integer number (2779317808983).

Almost surely, 2^{11112110012221} is an apocalyptic number.

It is an amenable number.

11112110012221 is a deficient number, since it is larger than the sum of its proper divisors (5161223711).

11112110012221 is an equidigital number, since it uses as much as digits as its factorization.

11112110012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5161223710.

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

Adding to 11112110012221 its reverse (12221001121111), we get a palindrome (23333111133332).

The spelling of 11112110012221 in words is "eleven trillion, one hundred twelve billion, one hundred ten million, twelve thousand, two hundred twenty-one".