11112221112111 has 32 divisors (see below), whose sum is σ = 18823698982400. Its totient is φ = 6346682864640.

The previous prime is 11112221112107. The next prime is 11112221112127. The reversal of 11112221112111 is 11121112221111.

It is not a de Polignac number, because 11112221112111 - 2² = 11112221112107 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 (11112221112151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14238226 + ... + 14998383.

It is an arithmetic number, because the mean of its divisors is an integer number (588240593200).

Almost surely, 2^{11112221112111} is an apocalyptic number.

11112221112111 is a deficient number, since it is larger than the sum of its proper divisors (7711477870289).

11112221112111 is a wasteful number, since it uses less digits than its factorization.

11112221112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29238636 (or 29238630 counting only the distinct ones).

The product of its digits is 16, while the sum is 18.

Adding to 11112221112111 its reverse (11121112221111), we get a palindrome (22233333333222).

The spelling of 11112221112111 in words is "eleven trillion, one hundred twelve billion, two hundred twenty-one million, one hundred twelve thousand, one hundred eleven".