111101001001009 has 2 divisors, whose sum is σ = 111101001001010. Its totient is φ = 111101001001008.

The previous prime is 111101001000991. The next prime is 111101001001033. The reversal of 111101001001009 is 900100100101111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56787859635984 + 54313141365025 = 7535772^2 + 7369745^2 .

It is a cyclic number.

It is not a de Polignac number, because 111101001001009 - 2²⁷ = 111100866783281 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111101001000983 and 111101001001001.

It is not a weakly prime, because it can be changed into another prime (111101001001709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55550500500504 + 55550500500505.

It is an arithmetic number, because the mean of its divisors is an integer number (55550500500505).

Almost surely, 2^{111101001001009} is an apocalyptic number.

It is an amenable number.

111101001001009 is a deficient number, since it is larger than the sum of its proper divisors (1).

111101001001009 is an equidigital number, since it uses as much as digits as its factorization.

111101001001009 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 111101001001009 in words is "one hundred eleven trillion, one hundred one billion, one million, one thousand, nine".