2121604220343 has 8 divisors (see below), whose sum is σ = 2830986669808. Its totient is φ = 1413312292224.

The previous prime is 2121604220339. The next prime is 2121604220353. The reversal of 2121604220343 is 3430224061212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2121604220343 - 2² = 2121604220339 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 2121604220343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121604220353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 272625796 + ... + 272633577.

It is an arithmetic number, because the mean of its divisors is an integer number (353873333726).

Almost surely, 2^{2121604220343} is an apocalyptic number.

2121604220343 is a deficient number, since it is larger than the sum of its proper divisors (709382449465).

2121604220343 is a wasteful number, since it uses less digits than its factorization.

2121604220343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545260673.

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 2121604220343 its reverse (3430224061212), we get a palindrome (5551828281555).

The spelling of 2121604220343 in words is "two trillion, one hundred twenty-one billion, six hundred four million, two hundred twenty thousand, three hundred forty-three".