2121244365329 has 4 divisors (see below), whose sum is σ = 2121247286640. Its totient is φ = 2121241444020.

The previous prime is 2121244365313. The next prime is 2121244365347. The reversal of 2121244365329 is 9235634421212.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2121244365329 - 2⁴ = 2121244365313 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2121244365329.

It is not an unprimeable number, because it can be changed into a prime (2121244365379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 564182 + ... + 2135600.

It is an arithmetic number, because the mean of its divisors is an integer number (530311821660).

Almost surely, 2^{2121244365329} is an apocalyptic number.

It is an amenable number.

2121244365329 is a deficient number, since it is larger than the sum of its proper divisors (2921311).

2121244365329 is a wasteful number, since it uses less digits than its factorization.

2121244365329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2921310.

The product of its digits is 622080, while the sum is 44.

The spelling of 2121244365329 in words is "two trillion, one hundred twenty-one billion, two hundred forty-four million, three hundred sixty-five thousand, three hundred twenty-nine".