11221212112111 has 4 divisors (see below), whose sum is σ = 11221723653952. Its totient is φ = 11220700570272.

The previous prime is 11221212112079. The next prime is 11221212112127. The reversal of 11221212112111 is 11121121212211.

11221212112111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11221212112111 - 2⁵ = 11221212112079 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 (11221212112151) 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, 255738015 + ... + 255781888.

It is an arithmetic number, because the mean of its divisors is an integer number (2805430913488).

Almost surely, 2^{11221212112111} is an apocalyptic number.

11221212112111 is a deficient number, since it is larger than the sum of its proper divisors (511541841).

11221212112111 is an equidigital number, since it uses as much as digits as its factorization.

11221212112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511541840.

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

Adding to 11221212112111 its reverse (11121121212211), we get a palindrome (22342333324322).

The spelling of 11221212112111 in words is "eleven trillion, two hundred twenty-one billion, two hundred twelve million, one hundred twelve thousand, one hundred eleven".