112212222121 has 2 divisors, whose sum is σ = 112212222122. Its totient is φ = 112212222120.

The previous prime is 112212222119. The next prime is 112212222137. The reversal of 112212222121 is 121222212211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57015888400 + 55196333721 = 238780^2 + 234939^2 .

It is an emirp because it is prime and its reverse (121222212211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 112212222121 - 2¹ = 112212222119 is a prime.

Together with 112212222119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (112212220121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56106111060 + 56106111061.

It is an arithmetic number, because the mean of its divisors is an integer number (56106111061).

Almost surely, 2^112212222121 is an apocalyptic number.

It is an amenable number.

112212222121 is a deficient number, since it is larger than the sum of its proper divisors (1).

112212222121 is an equidigital number, since it uses as much as digits as its factorization.

112212222121 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 112212222121 its reverse (121222212211), we get a palindrome (233434434332).

The spelling of 112212222121 in words is "one hundred twelve billion, two hundred twelve million, two hundred twenty-two thousand, one hundred twenty-one".