112212109 has 4 divisors (see below), whose sum is σ = 112399420. Its totient is φ = 112024800.

The previous prime is 112212103. The next prime is 112212131. The reversal of 112212109 is 901212211.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 96236100 + 15976009 = 9810^2 + 3997^2 .

It is a cyclic number.

It is not a de Polignac number, because 112212109 - 2¹⁵ = 112179341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112212103) 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, 92754 + ... + 93955.

It is an arithmetic number, because the mean of its divisors is an integer number (28099855).

Almost surely, 2^112212109 is an apocalyptic number.

It is an amenable number.

112212109 is a deficient number, since it is larger than the sum of its proper divisors (187311).

112212109 is an equidigital number, since it uses as much as digits as its factorization.

112212109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187310.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 112212109 is about 10593.0217124294. The cubic root of 112212109 is about 482.3325543159.

It can be divided in two parts, 1122 and 12109, that added together give a palindrome (13231).

The spelling of 112212109 in words is "one hundred twelve million, two hundred twelve thousand, one hundred nine".