112221122221 has 24 divisors (see below), whose sum is σ = 128950349760. Its totient is φ = 97405266816.

The previous prime is 112221122171. The next prime is 112221122287. The reversal of 112221122221 is 122221122211.

It is not a de Polignac number, because 112221122221 - 2¹⁹ = 112220597933 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 (112221122021) 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 23 ways as a sum of consecutive naturals, for example, 15336 + ... + 474001.

It is an arithmetic number, because the mean of its divisors is an integer number (5372931240).

Almost surely, 2^112221122221 is an apocalyptic number.

It is an amenable number.

112221122221 is a deficient number, since it is larger than the sum of its proper divisors (16729227539).

112221122221 is a wasteful number, since it uses less digits than its factorization.

112221122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489445 (or 489432 counting only the distinct ones).

The product of its digits is 128, while the sum is 19.

Adding to 112221122221 its reverse (122221122211), we get a palindrome (234442244432).

The spelling of 112221122221 in words is "one hundred twelve billion, two hundred twenty-one million, one hundred twenty-two thousand, two hundred twenty-one".