112212121121 has 8 divisors (see below), whose sum is σ = 112327772520. Its totient is φ = 112096524672.

The previous prime is 112212121117. The next prime is 112212121157. The reversal of 112212121121 is 121121212211.

It can be written as a sum of positive squares in 4 ways, for example, as 13249600 + 112198871521 = 3640^2 + 334961^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 112212121121 - 2² = 112212121117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 112212121121.

It is not an unprimeable number, because it can be changed into a prime (112212121921) 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, 4959791 + ... + 4982363.

It is an arithmetic number, because the mean of its divisors is an integer number (14040971565).

Almost surely, 2^112212121121 is an apocalyptic number.

It is an amenable number.

112212121121 is a deficient number, since it is larger than the sum of its proper divisors (115651399).

112212121121 is a wasteful number, since it uses less digits than its factorization.

112212121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27475.

The product of its digits is 32, while the sum is 17.

Adding to 112212121121 its reverse (121121212211), we get a palindrome (233333333332).

The spelling of 112212121121 in words is "one hundred twelve billion, two hundred twelve million, one hundred twenty-one thousand, one hundred twenty-one".