11101222111 has 8 divisors (see below), whose sum is σ = 12865803264. Its totient is φ = 9381314040.

The previous prime is 11101222087. The next prime is 11101222117. The reversal of 11101222111 is 11122210111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11101222111 - 2¹⁵ = 11101189343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11101222091 and 11101222100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101222117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11167735 + ... + 11168728.

It is an arithmetic number, because the mean of its divisors is an integer number (1608225408).

Almost surely, 2^11101222111 is an apocalyptic number.

11101222111 is a deficient number, since it is larger than the sum of its proper divisors (1764581153).

11101222111 is an equidigital number, since it uses as much as digits as its factorization.

11101222111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22336541.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11101222111 its reverse (11122210111), we get a palindrome (22223432222).

It can be divided in two parts, 1110 and 1222111, that added together give a palindrome (1223221).

The spelling of 11101222111 in words is "eleven billion, one hundred one million, two hundred twenty-two thousand, one hundred eleven".