11121121222111 has 8 divisors (see below), whose sum is σ = 11612441852640. Its totient is φ = 10630450060032.

The previous prime is 11121121222109. The next prime is 11121121222193. The reversal of 11121121222111 is 11122212112111.

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 11121121222111 - 2¹ = 11121121222109 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 (11121121222711) 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, 162332110 + ... + 162400603.

It is an arithmetic number, because the mean of its divisors is an integer number (1451555231580).

Almost surely, 2^{11121121222111} is an apocalyptic number.

11121121222111 is a deficient number, since it is larger than the sum of its proper divisors (491320630529).

11121121222111 is a wasteful number, since it uses less digits than its factorization.

11121121222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324734225.

The product of its digits is 32, while the sum is 19.

Adding to 11121121222111 its reverse (11122212112111), we get a palindrome (22243333334222).

The spelling of 11121121222111 in words is "eleven trillion, one hundred twenty-one billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred eleven".