2111020109 has 16 divisors (see below), whose sum is σ = 2410974720. Its totient is φ = 1829622960.

The previous prime is 2111020081. The next prime is 2111020129. The reversal of 2111020109 is 9010201112.

It is not a de Polignac number, because 2111020109 - 2¹² = 2111016013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111020129) 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 15 ways as a sum of consecutive naturals, for example, 64082 + ... + 91260.

It is an arithmetic number, because the mean of its divisors is an integer number (150685920).

Almost surely, 2^2111020109 is an apocalyptic number.

It is an amenable number.

2111020109 is a deficient number, since it is larger than the sum of its proper divisors (299954611).

2111020109 is a wasteful number, since it uses less digits than its factorization.

2111020109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27520.

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 2111020109 is about 45945.8388649070. The cubic root of 2111020109 is about 1282.8152774382.

It can be divided in two parts, 2 and 111020109, that added together give a palindrome (111020111).

The spelling of 2111020109 in words is "two billion, one hundred eleven million, twenty thousand, one hundred nine".