111888856801 has 2 divisors, whose sum is σ = 111888856802. Its totient is φ = 111888856800.

The previous prime is 111888856777. The next prime is 111888856813. The reversal of 111888856801 is 108658888111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97828826176 + 14060030625 = 312776^2 + 118575^2 .

It is an emirp because it is prime and its reverse (108658888111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111888856801 - 2¹⁹ = 111888332513 is a prime.

It is not a weakly prime, because it can be changed into another prime (111888856501) 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, 55944428400 + 55944428401.

It is an arithmetic number, because the mean of its divisors is an integer number (55944428401).

Almost surely, 2^111888856801 is an apocalyptic number.

It is an amenable number.

111888856801 is a deficient number, since it is larger than the sum of its proper divisors (1).

111888856801 is an equidigital number, since it uses as much as digits as its factorization.

111888856801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 983040, while the sum is 55.

The spelling of 111888856801 in words is "one hundred eleven billion, eight hundred eighty-eight million, eight hundred fifty-six thousand, eight hundred one".