2121340255252 has 6 divisors (see below), whose sum is σ = 3712345446698. Its totient is φ = 1060670127624.

The previous prime is 2121340255231. The next prime is 2121340255313. The reversal of 2121340255252 is 2525520431212.

It can be written as a sum of positive squares in only one way, i.e., 1480373490436 + 640966764816 = 1216706^2 + 800604^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265167531903 + ... + 265167531910.

Almost surely, 2^{2121340255252} is an apocalyptic number.

It is an amenable number.

2121340255252 is a deficient number, since it is larger than the sum of its proper divisors (1591005191446).

2121340255252 is a wasteful number, since it uses less digits than its factorization.

2121340255252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530335063817 (or 530335063815 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 34.

Adding to 2121340255252 its reverse (2525520431212), we get a palindrome (4646860686464).

The spelling of 2121340255252 in words is "two trillion, one hundred twenty-one billion, three hundred forty million, two hundred fifty-five thousand, two hundred fifty-two".