11221111103111 has 24 divisors (see below), whose sum is σ = 13922738380800. Its totient is φ = 8855060606496.

The previous prime is 11221111103093. The next prime is 11221111103149. The reversal of 11221111103111 is 11130111112211.

It is not a de Polignac number, because 11221111103111 - 2¹⁰ = 11221111102087 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 11221111103111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221111103311) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11929811 + ... + 12835988.

It is an arithmetic number, because the mean of its divisors is an integer number (580114099200).

Almost surely, 2^{11221111103111} is an apocalyptic number.

11221111103111 is a deficient number, since it is larger than the sum of its proper divisors (2701627277689).

11221111103111 is a wasteful number, since it uses less digits than its factorization.

11221111103111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24766215 (or 24766202 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 17.

Adding to 11221111103111 its reverse (11130111112211), we get a palindrome (22351222215322).

It can be divided in two parts, 1122111 and 1103111, that added together give a palindrome (2225222).

The spelling of 11221111103111 in words is "eleven trillion, two hundred twenty-one billion, one hundred eleven million, one hundred three thousand, one hundred eleven".