2109125911 has 16 divisors (see below), whose sum is σ = 2200586080. Its totient is φ = 2019738240.

The previous prime is 2109125881. The next prime is 2109125917. The reversal of 2109125911 is 1195219012.

It is not a de Polignac number, because 2109125911 - 2¹⁵ = 2109093143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2109125917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 631516 + ... + 634846.

It is an arithmetic number, because the mean of its divisors is an integer number (137536630).

Almost surely, 2^2109125911 is an apocalyptic number.

2109125911 is a deficient number, since it is larger than the sum of its proper divisors (91460169).

2109125911 is a wasteful number, since it uses less digits than its factorization.

2109125911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3634.

The product of its (nonzero) digits is 1620, while the sum is 31.

The square root of 2109125911 is about 45925.2208595669. The cubic root of 2109125911 is about 1282.4314766931.

The spelling of 2109125911 in words is "two billion, one hundred nine million, one hundred twenty-five thousand, nine hundred eleven".