11221110111121 has 8 divisors (see below), whose sum is σ = 11405983748040. Its totient is φ = 11037543002112.

The previous prime is 11221110111109. The next prime is 11221110111137. The reversal of 11221110111121 is 12111101112211.

It can be written as a sum of positive squares in 4 ways, for example, as 653518096 + 11220456593025 = 25564^2 + 3349695^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 11221110111121 - 2¹¹ = 11221110109073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11221110111095 and 11221110111104.

It is not an unprimeable number, because it can be changed into a prime (11221110111521) 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, 326614660 + ... + 326649013.

It is an arithmetic number, because the mean of its divisors is an integer number (1425747968505).

Almost surely, 2^{11221110111121} is an apocalyptic number.

It is an amenable number.

11221110111121 is a deficient number, since it is larger than the sum of its proper divisors (184873636919).

11221110111121 is an equidigital number, since it uses as much as digits as its factorization.

11221110111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653263955.

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

Adding to 11221110111121 its reverse (12111101112211), we get a palindrome (23332211223332).

The spelling of 11221110111121 in words is "eleven trillion, two hundred twenty-one billion, one hundred ten million, one hundred eleven thousand, one hundred twenty-one".