111111011011009 has 4 divisors (see below), whose sum is σ = 117646952835204. Its totient is φ = 104575069186816.

The previous prime is 111111011011003. The next prime is 111111011011027. The reversal of 111111011011009 is 900110110111111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 97881896286784 + 13229114724225 = 9893528^2 + 3637185^2 .

It is not a de Polignac number, because 111111011011009 - 2⁵ = 111111011010977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111111011011003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3267970912072 + ... + 3267970912105.

It is an arithmetic number, because the mean of its divisors is an integer number (29411738208801).

Almost surely, 2^{111111011011009} is an apocalyptic number.

It is an amenable number.

111111011011009 is a deficient number, since it is larger than the sum of its proper divisors (6535941824195).

111111011011009 is an equidigital number, since it uses as much as digits as its factorization.

111111011011009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6535941824194.

The product of its (nonzero) digits is 9, while the sum is 19.

The spelling of 111111011011009 in words is "one hundred eleven trillion, one hundred eleven billion, eleven million, eleven thousand, nine".