11112211101121 has 6 divisors (see below), whose sum is σ = 12032749299030. Its totient is φ = 10257425631648.

The previous prime is 11112211101109. The next prime is 11112211101143. The reversal of 11112211101121 is 12110111221111.

It can be written as a sum of positive squares in 3 ways, for example, as 197704729600 + 10914506371521 = 444640^2 + 3303711^2 .

It is a de Polignac number, because none of the positive numbers 2^k-11112211101121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11112211101095 and 11112211101104.

It is not an unprimeable number, because it can be changed into a prime (11112211131121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32876364036 + ... + 32876364373.

It is an arithmetic number, because the mean of its divisors is an integer number (2005458216505).

Almost surely, 2^{11112211101121} is an apocalyptic number.

It is an amenable number.

11112211101121 is a deficient number, since it is larger than the sum of its proper divisors (920538197909).

11112211101121 is an equidigital number, since it uses as much as digits as its factorization.

11112211101121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65752728435 (or 65752728422 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 11112211101121 its reverse (12110111221111), we get a palindrome (23222322322232).

The spelling of 11112211101121 in words is "eleven trillion, one hundred twelve billion, two hundred eleven million, one hundred one thousand, one hundred twenty-one".