111101101009 has 2 divisors, whose sum is σ = 111101101010. Its totient is φ = 111101101008.

The previous prime is 111101100997. The next prime is 111101101039. The reversal of 111101101009 is 900101101111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60158353984 + 50942747025 = 245272^2 + 225705^2 .

It is an emirp because it is prime and its reverse (900101101111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111101101009 - 2¹⁵ = 111101068241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111101100983 and 111101101001.

It is not a weakly prime, because it can be changed into another prime (111101101039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55550550504 + 55550550505.

It is an arithmetic number, because the mean of its divisors is an integer number (55550550505).

Almost surely, 2^111101101009 is an apocalyptic number.

It is an amenable number.

111101101009 is a deficient number, since it is larger than the sum of its proper divisors (1).

111101101009 is an equidigital number, since it uses as much as digits as its factorization.

111101101009 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 111101101009 in words is "one hundred eleven billion, one hundred one million, one hundred one thousand, nine".