551123421241 has 4 divisors (see below), whose sum is σ = 551124969552. Its totient is φ = 551121872932.

The previous prime is 551123421239. The next prime is 551123421271. The reversal of 551123421241 is 142124321155.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 142124321155 = 5 ⋅28424864231.

It is a cyclic number.

It is not a de Polignac number, because 551123421241 - 2¹ = 551123421239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551123421271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57786 + ... + 1051468.

It is an arithmetic number, because the mean of its divisors is an integer number (137781242388).

Almost surely, 2^551123421241 is an apocalyptic number.

It is an amenable number.

551123421241 is a deficient number, since it is larger than the sum of its proper divisors (1548311).

551123421241 is an equidigital number, since it uses as much as digits as its factorization.

551123421241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1548310.

The product of its digits is 9600, while the sum is 31.

Adding to 551123421241 its reverse (142124321155), we get a palindrome (693247742396).

The spelling of 551123421241 in words is "five hundred fifty-one billion, one hundred twenty-three million, four hundred twenty-one thousand, two hundred forty-one".