2134312221 has 4 divisors (see below), whose sum is σ = 2845749632. Its totient is φ = 1422874812.

The previous prime is 2134312183. The next prime is 2134312241. The reversal of 2134312221 is 1222134312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2134312221 - 2⁶ = 2134312157 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 (2134312241) 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, 355718701 + ... + 355718706.

It is an arithmetic number, because the mean of its divisors is an integer number (711437408).

Almost surely, 2^2134312221 is an apocalyptic number.

It is an amenable number.

2134312221 is a deficient number, since it is larger than the sum of its proper divisors (711437411).

2134312221 is an equidigital number, since it uses as much as digits as its factorization.

2134312221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711437410.

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

The square root of 2134312221 is about 46198.6170896922. The cubic root of 2134312221 is about 1287.5160463768.

Adding to 2134312221 its reverse (1222134312), we get a palindrome (3356446533).

The spelling of 2134312221 in words is "two billion, one hundred thirty-four million, three hundred twelve thousand, two hundred twenty-one".