11121122012111 has 4 divisors (see below), whose sum is σ = 11127690898632. Its totient is φ = 11114553125592.

The previous prime is 11121122011963. The next prime is 11121122012137. The reversal of 11121122012111 is 11121022112111.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11121122012111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11121122012111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121122017111) 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, 3284440721 + ... + 3284444106.

It is an arithmetic number, because the mean of its divisors is an integer number (2781922724658).

Almost surely, 2^{11121122012111} is an apocalyptic number.

11121122012111 is a deficient number, since it is larger than the sum of its proper divisors (6568886521).

11121122012111 is an equidigital number, since it uses as much as digits as its factorization.

11121122012111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6568886520.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 11121122012111 its reverse (11121022112111), we get a palindrome (22242144124222).

The spelling of 11121122012111 in words is "eleven trillion, one hundred twenty-one billion, one hundred twenty-two million, twelve thousand, one hundred eleven".