112222221121 has 2 divisors, whose sum is σ = 112222221122. Its totient is φ = 112222221120.

The previous prime is 112222221109. The next prime is 112222221131. The reversal of 112222221121 is 121122222211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88455682225 + 23766538896 = 297415^2 + 154164^2 .

It is an emirp because it is prime and its reverse (121122222211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 112222221121 - 2⁷ = 112222220993 is a prime.

It is not a weakly prime, because it can be changed into another prime (112222221101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56111110560 + 56111110561.

It is an arithmetic number, because the mean of its divisors is an integer number (56111110561).

Almost surely, 2^112222221121 is an apocalyptic number.

It is an amenable number.

112222221121 is a deficient number, since it is larger than the sum of its proper divisors (1).

112222221121 is an equidigital number, since it uses as much as digits as its factorization.

112222221121 is an odious number, because the sum of its binary digits is odd.

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

Adding to 112222221121 its reverse (121122222211), we get a palindrome (233344443332).

The spelling of 112222221121 in words is "one hundred twelve billion, two hundred twenty-two million, two hundred twenty-one thousand, one hundred twenty-one".