11221201112111 has 4 divisors (see below), whose sum is σ = 11221622465712. Its totient is φ = 11220779758512.

The previous prime is 11221201112059. The next prime is 11221201112137. The reversal of 11221201112111 is 11121110212211.

11221201112111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-11221201112111 is a prime.

It is a super-2 number, since 2×11221201112111² (a number of 27 digits) contains 22 as substring.

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 11221201112111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221201112141) 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, 210636851 + ... + 210690116.

It is an arithmetic number, because the mean of its divisors is an integer number (2805405616428).

Almost surely, 2^{11221201112111} is an apocalyptic number.

11221201112111 is a deficient number, since it is larger than the sum of its proper divisors (421353601).

11221201112111 is an equidigital number, since it uses as much as digits as its factorization.

11221201112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421353600.

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

Adding to 11221201112111 its reverse (11121110212211), we get a palindrome (22342311324322).

The spelling of 11221201112111 in words is "eleven trillion, two hundred twenty-one billion, two hundred one million, one hundred twelve thousand, one hundred eleven".