555551421111 has 12 divisors (see below), whose sum is σ = 811479605040. Its totient is φ = 366206179680.

The previous prime is 555551421109. The next prime is 555551421119. The reversal of 555551421111 is 111124155555.

555551421111 is a `hidden beast` number, since 5 + 5 + 5 + 5 + 514 + 21 + 111 = 666.

It is not a de Polignac number, because 555551421111 - 2¹ = 555551421109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555551421119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 346785355 + ... + 346786956.

It is an arithmetic number, because the mean of its divisors is an integer number (67623300420).

Almost surely, 2^555551421111 is an apocalyptic number.

555551421111 is a deficient number, since it is larger than the sum of its proper divisors (255928183929).

555551421111 is a wasteful number, since it uses less digits than its factorization.

555551421111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693572406 (or 693572403 counting only the distinct ones).

The product of its digits is 25000, while the sum is 36.

Adding to 555551421111 its reverse (111124155555), we get a palindrome (666675576666).

The spelling of 555551421111 in words is "five hundred fifty-five billion, five hundred fifty-one million, four hundred twenty-one thousand, one hundred eleven".