550255421121 has 64 divisors (see below), whose sum is σ = 865735299072. Its totient is φ = 304381239552.

The previous prime is 550255421117. The next prime is 550255421123. The reversal of 550255421121 is 121124552055.

It is not a de Polignac number, because 550255421121 - 2² = 550255421117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (550255421123) 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 63 ways as a sum of consecutive naturals, for example, 78795796 + ... + 78802778.

It is an arithmetic number, because the mean of its divisors is an integer number (13527114048).

Almost surely, 2^550255421121 is an apocalyptic number.

It is an amenable number.

550255421121 is a deficient number, since it is larger than the sum of its proper divisors (315479877951).

550255421121 is a wasteful number, since it uses less digits than its factorization.

550255421121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7982.

The product of its (nonzero) digits is 20000, while the sum is 33.

Adding to 550255421121 its reverse (121124552055), we get a palindrome (671379973176).

The spelling of 550255421121 in words is "five hundred fifty billion, two hundred fifty-five million, four hundred twenty-one thousand, one hundred twenty-one".