2111920711 has 4 divisors (see below), whose sum is σ = 2146542424. Its totient is φ = 2077299000.

The previous prime is 2111920691. The next prime is 2111920721. The reversal of 2111920711 is 1170291112.

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 2111920711 - 2⁷ = 2111920583 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 (2111920721) 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, 17310765 + ... + 17310886.

It is an arithmetic number, because the mean of its divisors is an integer number (536635606).

Almost surely, 2^2111920711 is an apocalyptic number.

2111920711 is a deficient number, since it is larger than the sum of its proper divisors (34621713).

2111920711 is an equidigital number, since it uses as much as digits as its factorization.

2111920711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34621712.

The product of its (nonzero) digits is 252, while the sum is 25.

The square root of 2111920711 is about 45955.6385115037. The cubic root of 2111920711 is about 1282.9976761036.

The spelling of 2111920711 in words is "two billion, one hundred eleven million, nine hundred twenty thousand, seven hundred eleven".