550520501420221 has 4 divisors (see below), whose sum is σ = 550532069211744. Its totient is φ = 550508933628700.

The previous prime is 550520501420191. The next prime is 550520501420257. The reversal of 550520501420221 is 122024105025055.

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 550520501420221 - 2⁵ = 550520501420189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550520501429221) 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, 5783824375 + ... + 5783919556.

It is an arithmetic number, because the mean of its divisors is an integer number (137633017302936).

Almost surely, 2^{550520501420221} is an apocalyptic number.

It is an amenable number.

550520501420221 is a deficient number, since it is larger than the sum of its proper divisors (11567791523).

550520501420221 is a wasteful number, since it uses less digits than its factorization.

550520501420221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11567791522.

The product of its (nonzero) digits is 40000, while the sum is 34.

Adding to 550520501420221 its reverse (122024105025055), we get a palindrome (672544606445276).

The spelling of 550520501420221 in words is "five hundred fifty trillion, five hundred twenty billion, five hundred one million, four hundred twenty thousand, two hundred twenty-one".