14011981981 has 2 divisors, whose sum is σ = 14011981982. Its totient is φ = 14011981980.

The previous prime is 14011981967. The next prime is 14011981993. The reversal of 14011981981 is 18918911041.

14011981981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11527457956 + 2484524025 = 107366^2 + 49845^2 .

It is a cyclic number.

It is not a de Polignac number, because 14011981981 - 2⁷ = 14011981853 is a prime.

It is a super-2 number, since 2×14011981981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14011981931) 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, 7005990990 + 7005990991.

It is an arithmetic number, because the mean of its divisors is an integer number (7005990991).

Almost surely, 2^14011981981 is an apocalyptic number.

It is an amenable number.

14011981981 is a deficient number, since it is larger than the sum of its proper divisors (1).

14011981981 is an equidigital number, since it uses as much as digits as its factorization.

14011981981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 43.

The spelling of 14011981981 in words is "fourteen billion, eleven million, nine hundred eighty-one thousand, nine hundred eighty-one".