112222111221221 has 16 divisors (see below), whose sum is σ = 112813036530480. Its totient is φ = 111632246046720.

The previous prime is 112222111221137. The next prime is 112222111221223. The reversal of 112222111221221 is 122122111222211.

It can be written as a sum of positive squares in 8 ways, for example, as 853896124225 + 111368215096996 = 924065^2 + 10553114^2 .

It is a cyclic number.

It is not a de Polignac number, because 112222111221221 - 2¹⁴ = 112222111204837 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 (112222111221223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2906611565 + ... + 2906650173.

It is an arithmetic number, because the mean of its divisors is an integer number (7050814783155).

Almost surely, 2^{112222111221221} is an apocalyptic number.

It is an amenable number.

112222111221221 is a deficient number, since it is larger than the sum of its proper divisors (590925309259).

112222111221221 is a wasteful number, since it uses less digits than its factorization.

112222111221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51944.

The product of its digits is 256, while the sum is 23.

Adding to 112222111221221 its reverse (122122111222211), we get a palindrome (234344222443432).

The spelling of 112222111221221 in words is "one hundred twelve trillion, two hundred twenty-two billion, one hundred eleven million, two hundred twenty-one thousand, two hundred twenty-one".