11100212111 has 4 divisors (see below), whose sum is σ = 11100570312. Its totient is φ = 11099853912.

The previous prime is 11100212087. The next prime is 11100212141. The reversal of 11100212111 is 11121200111.

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 11100212111 - 2²⁶ = 11033103247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11100212092 and 11100212101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11100212141) 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, 127700 + ... + 196233.

It is an arithmetic number, because the mean of its divisors is an integer number (2775142578).

Almost surely, 2^11100212111 is an apocalyptic number.

11100212111 is a deficient number, since it is larger than the sum of its proper divisors (358201).

11100212111 is an equidigital number, since it uses as much as digits as its factorization.

11100212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358200.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 11100212111 its reverse (11121200111), we get a palindrome (22221412222).

The spelling of 11100212111 in words is "eleven billion, one hundred million, two hundred twelve thousand, one hundred eleven".