11221211110111 has 4 divisors (see below), whose sum is σ = 11309567103232. Its totient is φ = 11132855116992.

The previous prime is 11221211110099. The next prime is 11221211110117. The reversal of 11221211110111 is 11101111212211.

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

It is a cyclic number.

It is not a de Polignac number, because 11221211110111 - 2²³ = 11221202721503 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 (11221211110117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44177996370 + ... + 44177996623.

It is an arithmetic number, because the mean of its divisors is an integer number (2827391775808).

Almost surely, 2^{11221211110111} is an apocalyptic number.

11221211110111 is a deficient number, since it is larger than the sum of its proper divisors (88355993121).

11221211110111 is an equidigital number, since it uses as much as digits as its factorization.

11221211110111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88355993120.

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

Adding to 11221211110111 its reverse (11101111212211), we get a palindrome (22322322322322).

The spelling of 11221211110111 in words is "eleven trillion, two hundred twenty-one billion, two hundred eleven million, one hundred ten thousand, one hundred eleven".