112121112221 has 8 divisors (see below), whose sum is σ = 115991222400. Its totient is φ = 108251259760.

The previous prime is 112121112209. The next prime is 112121112251. The reversal of 112121112221 is 122211121211.

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 112121112221 - 2⁶ = 112121112157 is a prime.

It is a super-2 number, since 2×112121112221² (a number of 23 digits) contains 22 as substring.

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 112121112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112121112251) 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 7 ways as a sum of consecutive naturals, for example, 1339520 + ... + 1420758.

It is an arithmetic number, because the mean of its divisors is an integer number (14498902800).

Almost surely, 2^112121112221 is an apocalyptic number.

It is an amenable number.

112121112221 is a deficient number, since it is larger than the sum of its proper divisors (3870110179).

112121112221 is an equidigital number, since it uses as much as digits as its factorization.

112121112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128859.

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

Adding to 112121112221 its reverse (122211121211), we get a palindrome (234332233432).

The spelling of 112121112221 in words is "one hundred twelve billion, one hundred twenty-one million, one hundred twelve thousand, two hundred twenty-one".