1112212111 has 4 divisors (see below), whose sum is σ = 1112283424. Its totient is φ = 1112140800.

The previous prime is 1112212109. The next prime is 1112212117. The reversal of 1112212111 is 1112122111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1112122111 = 7369 ⋅150919.

It is a cyclic number.

It is not a de Polignac number, because 1112212111 - 2¹ = 1112212109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1112212091 and 1112212100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1112212117) 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, 1095 + ... + 47176.

It is an arithmetic number, because the mean of its divisors is an integer number (278070856).

Almost surely, 2^1112212111 is an apocalyptic number.

1112212111 is a deficient number, since it is larger than the sum of its proper divisors (71313).

1112212111 is an equidigital number, since it uses as much as digits as its factorization.

1112212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71312.

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

The square root of 1112212111 is about 33349.8442425148. The cubic root of 1112212111 is about 1036.0861619801.

Adding to 1112212111 its reverse (1112122111), we get a palindrome (2224334222).

Subtracting from 1112212111 its reverse (1112122111), we obtain a square (90000 = 300²).

The spelling of 1112212111 in words is "one billion, one hundred twelve million, two hundred twelve thousand, one hundred eleven".