111032947981 has 2 divisors, whose sum is σ = 111032947982. Its totient is φ = 111032947980.

The previous prime is 111032947979. The next prime is 111032948023. The reversal of 111032947981 is 189749230111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110978261956 + 54686025 = 333134^2 + 7395^2 .

It is a cyclic number.

It is not a de Polignac number, because 111032947981 - 2¹ = 111032947979 is a prime.

It is a super-2 number, since 2×111032947981² (a number of 23 digits) contains 22 as substring.

Together with 111032947979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111032947901) 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, 55516473990 + 55516473991.

It is an arithmetic number, because the mean of its divisors is an integer number (55516473991).

Almost surely, 2^111032947981 is an apocalyptic number.

It is an amenable number.

111032947981 is a deficient number, since it is larger than the sum of its proper divisors (1).

111032947981 is an equidigital number, since it uses as much as digits as its factorization.

111032947981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 46.

The spelling of 111032947981 in words is "one hundred eleven billion, thirty-two million, nine hundred forty-seven thousand, nine hundred eighty-one".