2119211779 has 4 divisors (see below), whose sum is σ = 2119403160. Its totient is φ = 2119020400.

The previous prime is 2119211777. The next prime is 2119211803. The reversal of 2119211779 is 9771129112.

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 2119211779 - 2¹ = 2119211777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2119211771) 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, 77989 + ... + 101590.

It is an arithmetic number, because the mean of its divisors is an integer number (529850790).

Almost surely, 2^2119211779 is an apocalyptic number.

2119211779 is a deficient number, since it is larger than the sum of its proper divisors (191381).

2119211779 is a wasteful number, since it uses less digits than its factorization.

2119211779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191380.

The product of its digits is 15876, while the sum is 40.

The square root of 2119211779 is about 46034.8974040347. The cubic root of 2119211779 is about 1284.4724282835.

The spelling of 2119211779 in words is "two billion, one hundred nineteen million, two hundred eleven thousand, seven hundred seventy-nine".