2121321234 has 64 divisors (see below), whose sum is σ = 4934338560. Its totient is φ = 603060480.

The previous prime is 2121321233. The next prime is 2121321269. The reversal of 2121321234 is 4321231212.

It is a self number, because there is not a number n which added to its sum of digits gives 2121321234.

It is not an unprimeable number, because it can be changed into a prime (2121321233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20779 + ... + 68369.

It is an arithmetic number, because the mean of its divisors is an integer number (77099040).

Almost surely, 2^2121321234 is an apocalyptic number.

2121321234 is an abundant number, since it is smaller than the sum of its proper divisors (2813017326).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121321234 is a wasteful number, since it uses less digits than its factorization.

2121321234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47655.

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

The square root of 2121321234 is about 46057.8031825227. The cubic root of 2121321234 is about 1284.8984732072.

Adding to 2121321234 its reverse (4321231212), we get a palindrome (6442552446).

The spelling of 2121321234 in words is "two billion, one hundred twenty-one million, three hundred twenty-one thousand, two hundred thirty-four".