2123134221 has 8 divisors (see below), whose sum is σ = 3048603040. Its totient is φ = 1306544112.

The previous prime is 2123134217. The next prime is 2123134241. The reversal of 2123134221 is 1224313212.

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

It is not a de Polignac number, because 2123134221 - 2² = 2123134217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123134241) 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, 27219631 + ... + 27219708.

It is an arithmetic number, because the mean of its divisors is an integer number (381075380).

Almost surely, 2^2123134221 is an apocalyptic number.

It is an amenable number.

2123134221 is a deficient number, since it is larger than the sum of its proper divisors (925468819).

2123134221 is a wasteful number, since it uses less digits than its factorization.

2123134221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54439355.

The product of its digits is 576, while the sum is 21.

The square root of 2123134221 is about 46077.4806277427. The cubic root of 2123134221 is about 1285.2644150975.

Adding to 2123134221 its reverse (1224313212), we get a palindrome (3347447433).

The spelling of 2123134221 in words is "two billion, one hundred twenty-three million, one hundred thirty-four thousand, two hundred twenty-one".