5551420533221 has 24 divisors (see below), whose sum is σ = 6101109534720. Its totient is φ = 5044223423232.

The previous prime is 5551420533181. The next prime is 5551420533259. The reversal of 5551420533221 is 1223350241555.

It is not a de Polignac number, because 5551420533221 - 2¹⁸ = 5551420271077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5551420533721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 113680616 + ... + 113729438.

It is an arithmetic number, because the mean of its divisors is an integer number (254212897280).

Almost surely, 2^{5551420533221} is an apocalyptic number.

It is an amenable number.

5551420533221 is a deficient number, since it is larger than the sum of its proper divisors (549689001499).

5551420533221 is a wasteful number, since it uses less digits than its factorization.

5551420533221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62453 (or 62436 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 38.

Adding to 5551420533221 its reverse (1223350241555), we get a palindrome (6774770774776).

The spelling of 5551420533221 in words is "five trillion, five hundred fifty-one billion, four hundred twenty million, five hundred thirty-three thousand, two hundred twenty-one".