1121508218899 has 2 divisors, whose sum is σ = 1121508218900. Its totient is φ = 1121508218898.

The previous prime is 1121508218851. The next prime is 1121508218933. The reversal of 1121508218899 is 9988128051211.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1121508218899 - 2⁹ = 1121508218387 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121508218819) 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, 560754109449 + 560754109450.

It is an arithmetic number, because the mean of its divisors is an integer number (560754109450).

Almost surely, 2^{1121508218899} is an apocalyptic number.

1121508218899 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121508218899 is an equidigital number, since it uses as much as digits as its factorization.

1121508218899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 829440, while the sum is 55.

The spelling of 1121508218899 in words is "one trillion, one hundred twenty-one billion, five hundred eight million, two hundred eighteen thousand, eight hundred ninety-nine".