2123211311 has 8 divisors (see below), whose sum is σ = 2421037584. Its totient is φ = 1844599680.

The previous prime is 2123211289. The next prime is 2123211313. The reversal of 2123211311 is 1131123212.

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

It is a cyclic number.

It is not a de Polignac number, because 2123211311 - 2⁶ = 2123211247 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2123211311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123211313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4803425 + ... + 4803866.

It is an arithmetic number, because the mean of its divisors is an integer number (302629698).

Almost surely, 2^2123211311 is an apocalyptic number.

2123211311 is a deficient number, since it is larger than the sum of its proper divisors (297826273).

2123211311 is a wasteful number, since it uses less digits than its factorization.

2123211311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9607321.

The product of its digits is 72, while the sum is 17.

The square root of 2123211311 is about 46078.3171459202. The cubic root of 2123211311 is about 1285.2799706903.

Adding to 2123211311 its reverse (1131123212), we get a palindrome (3254334523).

The spelling of 2123211311 in words is "two billion, one hundred twenty-three million, two hundred eleven thousand, three hundred eleven".