10111111009 has 2 divisors, whose sum is σ = 10111111010. Its totient is φ = 10111111008.

The previous prime is 10111110979. The next prime is 10111111019. The reversal of 10111111009 is 90011111101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6423221025 + 3687889984 = 80145^2 + 60728^2 .

It is a cyclic number.

It is not a de Polignac number, because 10111111009 - 2¹¹ = 10111108961 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10111110983 and 10111111001.

It is not a weakly prime, because it can be changed into another prime (10111111019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5055555504 + 5055555505.

It is an arithmetic number, because the mean of its divisors is an integer number (5055555505).

Almost surely, 2^10111111009 is an apocalyptic number.

It is an amenable number.

10111111009 is a deficient number, since it is larger than the sum of its proper divisors (1).

10111111009 is an equidigital number, since it uses as much as digits as its factorization.

10111111009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9, while the sum is 16.

The spelling of 10111111009 in words is "ten billion, one hundred eleven million, one hundred eleven thousand, nine".