11101221112111 has 4 divisors (see below), whose sum is σ = 11955161197672. Its totient is φ = 10247281026552.

The previous prime is 11101221112097. The next prime is 11101221112117. The reversal of 11101221112111 is 11121112210111.

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 11101221112111 - 2⁹ = 11101221111599 is a prime.

It is a super-2 number, since 2×11101221112111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101221112117) 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, 426970042761 + ... + 426970042786.

It is an arithmetic number, because the mean of its divisors is an integer number (2988790299418).

Almost surely, 2^{11101221112111} is an apocalyptic number.

11101221112111 is a deficient number, since it is larger than the sum of its proper divisors (853940085561).

11101221112111 is an equidigital number, since it uses as much as digits as its factorization.

11101221112111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853940085560.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 11101221112111 its reverse (11121112210111), we get a palindrome (22222333322222).

The spelling of 11101221112111 in words is "eleven trillion, one hundred one billion, two hundred twenty-one million, one hundred twelve thousand, one hundred eleven".