111882521 has 2 divisors, whose sum is σ = 111882522. Its totient is φ = 111882520.

The previous prime is 111882509. The next prime is 111882527. The reversal of 111882521 is 125288111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84842521 + 27040000 = 9211^2 + 5200^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111882521 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (111882527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55941260 + 55941261.

It is an arithmetic number, because the mean of its divisors is an integer number (55941261).

Almost surely, 2^111882521 is an apocalyptic number.

It is an amenable number.

111882521 is a deficient number, since it is larger than the sum of its proper divisors (1).

111882521 is an equidigital number, since it uses as much as digits as its factorization.

111882521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1280, while the sum is 29.

The square root of 111882521 is about 10577.4534269833. The cubic root of 111882521 is about 481.8598575028.

The spelling of 111882521 in words is "one hundred eleven million, eight hundred eighty-two thousand, five hundred twenty-one".