55321603121 has 4 divisors (see below), whose sum is σ = 55472343552. Its totient is φ = 55170862692.

The previous prime is 55321603111. The next prime is 55321603151. The reversal of 55321603121 is 12130612355.

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 a de Polignac number, because none of the positive numbers 2^k-55321603121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55321603111) 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, 75369665 + ... + 75370398.

It is an arithmetic number, because the mean of its divisors is an integer number (13868085888).

Almost surely, 2^55321603121 is an apocalyptic number.

It is an amenable number.

55321603121 is a deficient number, since it is larger than the sum of its proper divisors (150740431).

55321603121 is a wasteful number, since it uses less digits than its factorization.

55321603121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150740430.

The product of its (nonzero) digits is 5400, while the sum is 29.

The spelling of 55321603121 in words is "fifty-five billion, three hundred twenty-one million, six hundred three thousand, one hundred twenty-one".