11121022220111 has 4 divisors (see below), whose sum is σ = 11121028895832. Its totient is φ = 11121015544392.

The previous prime is 11121022220081. The next prime is 11121022220117. The reversal of 11121022220111 is 11102222012111.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11121022220111 - 2²² = 11121018025807 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 11121022220111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121022220117) 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, 1455281 + ... + 4935573.

It is an arithmetic number, because the mean of its divisors is an integer number (2780257223958).

Almost surely, 2^{11121022220111} is an apocalyptic number.

11121022220111 is a deficient number, since it is larger than the sum of its proper divisors (6675721).

11121022220111 is an equidigital number, since it uses as much as digits as its factorization.

11121022220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6675720.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 11121022220111 its reverse (11102222012111), we get a palindrome (22223244232222).

The spelling of 11121022220111 in words is "eleven trillion, one hundred twenty-one billion, twenty-two million, two hundred twenty thousand, one hundred eleven".