11112101111 has 4 divisors (see below), whose sum is σ = 11160625800. Its totient is φ = 11063576424.

The previous prime is 11112101107. The next prime is 11112101167. The reversal of 11112101111 is 11110121111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11110121111 = 151 ⋅73576961.

It is a cyclic number.

It is not a de Polignac number, because 11112101111 - 2² = 11112101107 is a prime.

It is a super-2 number, since 2×11112101111² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11112101092 and 11112101101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11112101411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24262001 + ... + 24262458.

It is an arithmetic number, because the mean of its divisors is an integer number (2790156450).

Almost surely, 2^11112101111 is an apocalyptic number.

11112101111 is a deficient number, since it is larger than the sum of its proper divisors (48524689).

11112101111 is an equidigital number, since it uses as much as digits as its factorization.

11112101111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48524688.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 11112101111 its reverse (11110121111), we get a palindrome (22222222222).

The spelling of 11112101111 in words is "eleven billion, one hundred twelve million, one hundred one thousand, one hundred eleven".