551243111201 has 2 divisors, whose sum is σ = 551243111202. Its totient is φ = 551243111200.

The previous prime is 551243111149. The next prime is 551243111203. The reversal of 551243111201 is 102111342155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 440100886801 + 111142224400 = 663401^2 + 333380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551243111201 is a prime.

Together with 551243111203, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (551243111203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275621555600 + 275621555601.

It is an arithmetic number, because the mean of its divisors is an integer number (275621555601).

Almost surely, 2^551243111201 is an apocalyptic number.

It is an amenable number.

551243111201 is a deficient number, since it is larger than the sum of its proper divisors (1).

551243111201 is an equidigital number, since it uses as much as digits as its factorization.

551243111201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 26.

Adding to 551243111201 its reverse (102111342155), we get a palindrome (653354453356).

The spelling of 551243111201 in words is "five hundred fifty-one billion, two hundred forty-three million, one hundred eleven thousand, two hundred one".