2123121234 has 16 divisors (see below), whose sum is σ = 4572876672. Its totient is φ = 653268048.

The previous prime is 2123121197. The next prime is 2123121241. The reversal of 2123121234 is 4321213212.

It is a self number, because there is not a number n which added to its sum of digits gives 2123121234.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13609674 + ... + 13609829.

It is an arithmetic number, because the mean of its divisors is an integer number (285804792).

Almost surely, 2^2123121234 is an apocalyptic number.

2123121234 is an abundant number, since it is smaller than the sum of its proper divisors (2449755438).

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

2123121234 is a wasteful number, since it uses less digits than its factorization.

2123121234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27219521.

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

The square root of 2123121234 is about 46077.3397018534. The cubic root of 2123121234 is about 1285.2617944807.

Adding to 2123121234 its reverse (4321213212), we get a palindrome (6444334446).

The spelling of 2123121234 in words is "two billion, one hundred twenty-three million, one hundred twenty-one thousand, two hundred thirty-four".