2121604220513 has 8 divisors (see below), whose sum is σ = 2305308491520. Its totient is φ = 1945104038640.

The previous prime is 2121604220501. The next prime is 2121604220521. The reversal of 2121604220513 is 3150224061212.

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

It is a cyclic number.

It is not a de Polignac number, because 2121604220513 - 2⁴ = 2121604220497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121604220543) 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, 1801021670 + ... + 1801022847.

It is an arithmetic number, because the mean of its divisors is an integer number (288163561440).

Almost surely, 2^{2121604220513} is an apocalyptic number.

It is an amenable number.

2121604220513 is a deficient number, since it is larger than the sum of its proper divisors (183704271007).

2121604220513 is a wasteful number, since it uses less digits than its factorization.

2121604220513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3602044567.

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 2121604220513 its reverse (3150224061212), we get a palindrome (5271828281725).

The spelling of 2121604220513 in words is "two trillion, one hundred twenty-one billion, six hundred four million, two hundred twenty thousand, five hundred thirteen".