2140123211 has 4 divisors (see below), whose sum is σ = 2165907912. Its totient is φ = 2114338512.

The previous prime is 2140123189. The next prime is 2140123213. The reversal of 2140123211 is 1123210412.

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 2140123211 - 2¹⁸ = 2139861067 is a prime.

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 2140123211.

It is not an unprimeable number, because it can be changed into a prime (2140123213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12892226 + ... + 12892391.

It is an arithmetic number, because the mean of its divisors is an integer number (541476978).

Almost surely, 2^2140123211 is an apocalyptic number.

2140123211 is a deficient number, since it is larger than the sum of its proper divisors (25784701).

2140123211 is an equidigital number, since it uses as much as digits as its factorization.

2140123211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25784700.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 2140123211 is about 46261.4657247260. The cubic root of 2140123211 is about 1288.6834736769.

Adding to 2140123211 its reverse (1123210412), we get a palindrome (3263333623).

The spelling of 2140123211 in words is "two billion, one hundred forty million, one hundred twenty-three thousand, two hundred eleven".