111211010109 has 12 divisors (see below), whose sum is σ = 165820001152. Its totient is φ = 71749038600.

The previous prime is 111211010089. The next prime is 111211010143. The reversal of 111211010109 is 901010112111.

It is not a de Polignac number, because 111211010109 - 2⁵ = 111211010077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111211010091 and 111211010100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111211018109) 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 11 ways as a sum of consecutive naturals, for example, 199302607 + ... + 199303164.

Almost surely, 2^111211010109 is an apocalyptic number.

It is an amenable number.

111211010109 is a deficient number, since it is larger than the sum of its proper divisors (54608991043).

111211010109 is a wasteful number, since it uses less digits than its factorization.

111211010109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398605808 (or 398605805 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 18.

The spelling of 111211010109 in words is "one hundred eleven billion, two hundred eleven million, ten thousand, one hundred nine".