2123111211 has 8 divisors (see below), whose sum is σ = 3048570000. Its totient is φ = 1306529952.

The previous prime is 2123111173. The next prime is 2123111219. The reversal of 2123111211 is 1121113212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2123111211 - 2⁹ = 2123110699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2123111219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27219336 + ... + 27219413.

It is an arithmetic number, because the mean of its divisors is an integer number (381071250).

Almost surely, 2^2123111211 is an apocalyptic number.

2123111211 is a deficient number, since it is larger than the sum of its proper divisors (925458789).

2123111211 is a wasteful number, since it uses less digits than its factorization.

2123111211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54438765.

The product of its digits is 24, while the sum is 15.

The square root of 2123111211 is about 46077.2309389356. The cubic root of 2123111211 is about 1285.2597719554.

Adding to 2123111211 its reverse (1121113212), we get a palindrome (3244224423).

The spelling of 2123111211 in words is "two billion, one hundred twenty-three million, one hundred eleven thousand, two hundred eleven".