1121144551 has 2 divisors, whose sum is σ = 1121144552. Its totient is φ = 1121144550.

The previous prime is 1121144539. The next prime is 1121144573. The reversal of 1121144551 is 1554411211.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1121144551 - 2²⁹ = 584273639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121144501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560572275 + 560572276.

It is an arithmetic number, because the mean of its divisors is an integer number (560572276).

Almost surely, 2^1121144551 is an apocalyptic number.

1121144551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121144551 is an equidigital number, since it uses as much as digits as its factorization.

1121144551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 800, while the sum is 25.

The square root of 1121144551 is about 33483.4966961338. The cubic root of 1121144551 is about 1038.8524543592.

Adding to 1121144551 its reverse (1554411211), we get a palindrome (2675555762).

The spelling of 1121144551 in words is "one billion, one hundred twenty-one million, one hundred forty-four thousand, five hundred fifty-one".