112211210111981 has 2 divisors, whose sum is σ = 112211210111982. Its totient is φ = 112211210111980.

The previous prime is 112211210111939. The next prime is 112211210112007. The reversal of 112211210111981 is 189111012112211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111397660231081 + 813549880900 = 10554509^2 + 901970^2 .

It is a cyclic number.

It is not a de Polignac number, because 112211210111981 - 2³⁴ = 112194030242797 is a prime.

It is a super-2 number, since 2×112211210111981² (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 (112211210101981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56105605055990 + 56105605055991.

It is an arithmetic number, because the mean of its divisors is an integer number (56105605055991).

Almost surely, 2^{112211210111981} is an apocalyptic number.

It is an amenable number.

112211210111981 is a deficient number, since it is larger than the sum of its proper divisors (1).

112211210111981 is an equidigital number, since it uses as much as digits as its factorization.

112211210111981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 32.

The spelling of 112211210111981 in words is "one hundred twelve trillion, two hundred eleven billion, two hundred ten million, one hundred eleven thousand, nine hundred eighty-one".