56005105610121 has 4 divisors (see below), whose sum is σ = 74673474146832. Its totient is φ = 37336737073412.

The previous prime is 56005105610119. The next prime is 56005105610161. The reversal of 56005105610121 is 12101650150065.

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.

It is a cyclic number.

It is not a de Polignac number, because 56005105610121 - 2¹ = 56005105610119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56005105610161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9334184268351 + ... + 9334184268356.

It is an arithmetic number, because the mean of its divisors is an integer number (18668368536708).

Almost surely, 2^{56005105610121} is an apocalyptic number.

It is an amenable number.

56005105610121 is a deficient number, since it is larger than the sum of its proper divisors (18668368536711).

56005105610121 is a wasteful number, since it uses less digits than its factorization.

56005105610121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18668368536710.

The product of its (nonzero) digits is 9000, while the sum is 33.

Adding to 56005105610121 its reverse (12101650150065), we get a palindrome (68106755760186).

The spelling of 56005105610121 in words is "fifty-six trillion, five billion, one hundred five million, six hundred ten thousand, one hundred twenty-one".