112122012121981 has 2 divisors, whose sum is σ = 112122012121982. Its totient is φ = 112122012121980.

The previous prime is 112122012121919. The next prime is 112122012122011. The reversal of 112122012121981 is 189121210221211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110796886520100 + 1325125601881 = 10526010^2 + 1151141^2 .

It is a cyclic number.

It is not a de Polignac number, because 112122012121981 - 2¹⁷ = 112122011990909 is a prime.

It is a super-2 number, since 2×112122012121981² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (112122012121901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56061006060990 + 56061006060991.

It is an arithmetic number, because the mean of its divisors is an integer number (56061006060991).

Almost surely, 2^{112122012121981} is an apocalyptic number.

It is an amenable number.

112122012121981 is a deficient number, since it is larger than the sum of its proper divisors (1).

112122012121981 is an equidigital number, since it uses as much as digits as its factorization.

112122012121981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 34.

The spelling of 112122012121981 in words is "one hundred twelve trillion, one hundred twenty-two billion, twelve million, one hundred twenty-one thousand, nine hundred eighty-one".