112112021981 has 2 divisors, whose sum is σ = 112112021982. Its totient is φ = 112112021980.

The previous prime is 112112021953. The next prime is 112112022019. The reversal of 112112021981 is 189120211211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105907939225 + 6204082756 = 325435^2 + 78766^2 .

It is a cyclic number.

It is not a de Polignac number, because 112112021981 - 2¹⁴ = 112112005597 is a prime.

It is a super-2 number, since 2×112112021981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (112112021941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56056010990 + 56056010991.

It is an arithmetic number, because the mean of its divisors is an integer number (56056010991).

Almost surely, 2^112112021981 is an apocalyptic number.

It is an amenable number.

112112021981 is a deficient number, since it is larger than the sum of its proper divisors (1).

112112021981 is an equidigital number, since it uses as much as digits as its factorization.

112112021981 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 29.

The spelling of 112112021981 in words is "one hundred twelve billion, one hundred twelve million, twenty-one thousand, nine hundred eighty-one".