2122135205 has 4 divisors (see below), whose sum is σ = 2546562252. Its totient is φ = 1697708160.

The previous prime is 2122135159. The next prime is 2122135217. The reversal of 2122135205 is 5025312212.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1170597796 + 951537409 = 34214^2 + 30847^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2122135205 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 11.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212213516 + ... + 212213525.

It is an arithmetic number, because the mean of its divisors is an integer number (636640563).

Almost surely, 2^2122135205 is an apocalyptic number.

It is an amenable number.

2122135205 is a deficient number, since it is larger than the sum of its proper divisors (424427047).

2122135205 is an equidigital number, since it uses as much as digits as its factorization.

2122135205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424427046.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 2122135205 is about 46066.6387421527. The cubic root of 2122135205 is about 1285.0627947531.

Adding to 2122135205 its reverse (5025312212), we get a palindrome (7147447417).

The spelling of 2122135205 in words is "two billion, one hundred twenty-two million, one hundred thirty-five thousand, two hundred five".