111001109873 has 2 divisors, whose sum is σ = 111001109874. Its totient is φ = 111001109872.

The previous prime is 111001109801. The next prime is 111001109887. The reversal of 111001109873 is 378901100111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94087587169 + 16913522704 = 306737^2 + 130052^2 .

It is a cyclic number.

It is not a de Polignac number, because 111001109873 - 2²⁰ = 111000061297 is a prime.

It is a super-2 number, since 2×111001109873² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111001109893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55500554936 + 55500554937.

It is an arithmetic number, because the mean of its divisors is an integer number (55500554937).

Almost surely, 2^111001109873 is an apocalyptic number.

It is an amenable number.

111001109873 is a deficient number, since it is larger than the sum of its proper divisors (1).

111001109873 is an equidigital number, since it uses as much as digits as its factorization.

111001109873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 32.

Adding to 111001109873 its reverse (378901100111), we get a palindrome (489902209984).

The spelling of 111001109873 in words is "one hundred eleven billion, one million, one hundred nine thousand, eight hundred seventy-three".