112121111111 has 4 divisors (see below), whose sum is σ = 113231221224. Its totient is φ = 111011001000.

The previous prime is 112121111107. The next prime is 112121111173. The reversal of 112121111111 is 111111121211.

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 112121111111 - 2² = 112121111107 is a prime.

It is a super-2 number, since 2×112121111111² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

112121111111 is a modest number, since divided by 1111111 gives 11212 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112121116111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555054905 + ... + 555055106.

It is an arithmetic number, because the mean of its divisors is an integer number (28307805306).

Almost surely, 2^112121111111 is an apocalyptic number.

112121111111 is a deficient number, since it is larger than the sum of its proper divisors (1110110113).

112121111111 is a wasteful number, since it uses less digits than its factorization.

112121111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110110112.

The product of its digits is 4, while the sum is 14.

Adding to 112121111111 its reverse (111111121211), we get a palindrome (223232232322).

It can be divided in two parts, 1121211 and 11111, that multiplied together give a palindrome (12457775421).

The spelling of 112121111111 in words is "one hundred twelve billion, one hundred twenty-one million, one hundred eleven thousand, one hundred eleven".