11221112111 has 8 divisors (see below), whose sum is σ = 12241979904. Its totient is φ = 10200372120.

The previous prime is 11221112087. The next prime is 11221112197. The reversal of 11221112111 is 11121112211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11221112111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221112411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 328316 + ... + 360878.

It is an arithmetic number, because the mean of its divisors is an integer number (1530247488).

Almost surely, 2^11221112111 is an apocalyptic number.

11221112111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11221112111 is a deficient number, since it is larger than the sum of its proper divisors (1020867793).

11221112111 is a wasteful number, since it uses less digits than its factorization.

11221112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63901.

The product of its digits is 8, while the sum is 14.

Adding to 11221112111 its reverse (11121112211), we get a palindrome (22342224322).

The spelling of 11221112111 in words is "eleven billion, two hundred twenty-one million, one hundred twelve thousand, one hundred eleven".