2120231311 has 4 divisors (see below), whose sum is σ = 2312979624. Its totient is φ = 1927483000.

The previous prime is 2120231297. The next prime is 2120231327. The reversal of 2120231311 is 1131320212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120231311 is a prime.

It is a super-3 number, since 3×2120231311³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120231341) 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, 96374140 + ... + 96374161.

It is an arithmetic number, because the mean of its divisors is an integer number (578244906).

Almost surely, 2^2120231311 is an apocalyptic number.

2120231311 is a deficient number, since it is larger than the sum of its proper divisors (192748313).

2120231311 is a wasteful number, since it uses less digits than its factorization.

2120231311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192748312.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2120231311 is about 46045.9695413182. The cubic root of 2120231311 is about 1284.6783776223.

Adding to 2120231311 its reverse (1131320212), we get a palindrome (3251551523).

The spelling of 2120231311 in words is "two billion, one hundred twenty million, two hundred thirty-one thousand, three hundred eleven".