11112122212111 has 4 divisors (see below), whose sum is σ = 11112177539632. Its totient is φ = 11112066884592.

The previous prime is 11112122212097. The next prime is 11112122212199. The reversal of 11112122212111 is 11121222121111.

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 11112122212111 - 2¹⁵ = 11112122179343 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 (11112122252111) 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, 27361395 + ... + 27764548.

It is an arithmetic number, because the mean of its divisors is an integer number (2778044384908).

Almost surely, 2^{11112122212111} is an apocalyptic number.

11112122212111 is a deficient number, since it is larger than the sum of its proper divisors (55327521).

11112122212111 is an equidigital number, since it uses as much as digits as its factorization.

11112122212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55327520.

The product of its digits is 32, while the sum is 19.

Adding to 11112122212111 its reverse (11121222121111), we get a palindrome (22233344333222).

The spelling of 11112122212111 in words is "eleven trillion, one hundred twelve billion, one hundred twenty-two million, two hundred twelve thousand, one hundred eleven".