112111001221 has 2 divisors, whose sum is σ = 112111001222. Its totient is φ = 112111001220.

The previous prime is 112111001207. The next prime is 112111001227. The reversal of 112111001221 is 122100111211.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94872624196 + 17238377025 = 308014^2 + 131295^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-112111001221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (112111001227) 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, 56055500610 + 56055500611.

It is an arithmetic number, because the mean of its divisors is an integer number (56055500611).

Almost surely, 2^112111001221 is an apocalyptic number.

It is an amenable number.

112111001221 is a deficient number, since it is larger than the sum of its proper divisors (1).

112111001221 is an equidigital number, since it uses as much as digits as its factorization.

112111001221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 112111001221 its reverse (122100111211), we get a palindrome (234211112432).

The spelling of 112111001221 in words is "one hundred twelve billion, one hundred eleven million, one thousand, two hundred twenty-one".