111012201091 has 4 divisors (see below), whose sum is σ = 121104219384. Its totient is φ = 100920182800.

The previous prime is 111012201071. The next prime is 111012201119. The reversal of 111012201091 is 190102210111.

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

It is a cyclic number.

It is not a de Polignac number, because 111012201091 - 2⁷ = 111012200963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111012201071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5046009130 + ... + 5046009151.

It is an arithmetic number, because the mean of its divisors is an integer number (30276054846).

Almost surely, 2^111012201091 is an apocalyptic number.

111012201091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111012201091 is a deficient number, since it is larger than the sum of its proper divisors (10092018293).

111012201091 is a wasteful number, since it uses less digits than its factorization.

111012201091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10092018292.

The product of its (nonzero) digits is 36, while the sum is 19.

The spelling of 111012201091 in words is "one hundred eleven billion, twelve million, two hundred one thousand, ninety-one".