11121322111 has 4 divisors (see below), whose sum is σ = 11121657424. Its totient is φ = 11120986800.

The previous prime is 11121322087. The next prime is 11121322169. The reversal of 11121322111 is 11122312111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11122312111 = 89 ⋅124969799.

It is a cyclic number.

It is not a de Polignac number, because 11121322111 - 2²¹ = 11119224959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121323111) 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, 111675 + ... + 186316.

It is an arithmetic number, because the mean of its divisors is an integer number (2780414356).

Almost surely, 2^11121322111 is an apocalyptic number.

11121322111 is a deficient number, since it is larger than the sum of its proper divisors (335313).

11121322111 is an equidigital number, since it uses as much as digits as its factorization.

11121322111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335312.

The product of its digits is 24, while the sum is 16.

Adding to 11121322111 its reverse (11122312111), we get a palindrome (22243634222).

The spelling of 11121322111 in words is "eleven billion, one hundred twenty-one million, three hundred twenty-two thousand, one hundred eleven".