2112029981 has 2 divisors, whose sum is σ = 2112029982. Its totient is φ = 2112029980.

The previous prime is 2112029977. The next prime is 2112029999. The reversal of 2112029981 is 1899202112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1377077881 + 734952100 = 37109^2 + 27110^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112029981 - 2² = 2112029977 is a prime.

It is a super-2 number, since 2×2112029981² = 8921341281285720722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2112029681) 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, 1056014990 + 1056014991.

It is an arithmetic number, because the mean of its divisors is an integer number (1056014991).

Almost surely, 2^2112029981 is an apocalyptic number.

It is an amenable number.

2112029981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2112029981 is an equidigital number, since it uses as much as digits as its factorization.

2112029981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 2112029981 is about 45956.8273600343. The cubic root of 2112029981 is about 1283.0198029978.

The spelling of 2112029981 in words is "two billion, one hundred twelve million, twenty-nine thousand, nine hundred eighty-one".