111020106805873 has 2 divisors, whose sum is σ = 111020106805874. Its totient is φ = 111020106805872.

The previous prime is 111020106805837. The next prime is 111020106805877. The reversal of 111020106805873 is 378508601020111.

Together with previous prime (111020106805837) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66128659594209 + 44891447211664 = 8131953^2 + 6700108^2 .

It is an emirp because it is prime and its reverse (378508601020111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111020106805873 - 2¹⁷ = 111020106674801 is a prime.

It is not a weakly prime, because it can be changed into another prime (111020106805877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55510053402936 + 55510053402937.

It is an arithmetic number, because the mean of its divisors is an integer number (55510053402937).

Almost surely, 2^{111020106805873} is an apocalyptic number.

It is an amenable number.

111020106805873 is a deficient number, since it is larger than the sum of its proper divisors (1).

111020106805873 is an equidigital number, since it uses as much as digits as its factorization.

111020106805873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 43.

Adding to 111020106805873 its reverse (378508601020111), we get a palindrome (489528707825984).

The spelling of 111020106805873 in words is "one hundred eleven trillion, twenty billion, one hundred six million, eight hundred five thousand, eight hundred seventy-three".