112111220219981 has 2 divisors, whose sum is σ = 112111220219982. Its totient is φ = 112111220219980.

The previous prime is 112111220219953. The next prime is 112111220220023. The reversal of 112111220219981 is 189912022111211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110659354275625 + 1451865944356 = 10519475^2 + 1204934^2 .

It is a cyclic number.

It is not a de Polignac number, because 112111220219981 - 2¹⁴ = 112111220203597 is a prime.

It is a super-2 number, since 2×112111220219981² (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 (112111220219941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56055610109990 + 56055610109991.

It is an arithmetic number, because the mean of its divisors is an integer number (56055610109991).

Almost surely, 2^{112111220219981} is an apocalyptic number.

It is an amenable number.

112111220219981 is a deficient number, since it is larger than the sum of its proper divisors (1).

112111220219981 is an equidigital number, since it uses as much as digits as its factorization.

112111220219981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 41.

The spelling of 112111220219981 in words is "one hundred twelve trillion, one hundred eleven billion, two hundred twenty million, two hundred nineteen thousand, nine hundred eighty-one".