11199121649 has 2 divisors, whose sum is σ = 11199121650. Its totient is φ = 11199121648.

The previous prime is 11199121643. The next prime is 11199121667. The reversal of 11199121649 is 94612199111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10954762225 + 244359424 = 104665^2 + 15632^2 .

It is a cyclic number.

It is not a de Polignac number, because 11199121649 - 2⁸ = 11199121393 is a prime.

It is not a weakly prime, because it can be changed into another prime (11199121643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5599560824 + 5599560825.

It is an arithmetic number, because the mean of its divisors is an integer number (5599560825).

Almost surely, 2^11199121649 is an apocalyptic number.

It is an amenable number.

11199121649 is a deficient number, since it is larger than the sum of its proper divisors (1).

11199121649 is an equidigital number, since it uses as much as digits as its factorization.

11199121649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 44.

The spelling of 11199121649 in words is "eleven billion, one hundred ninety-nine million, one hundred twenty-one thousand, six hundred forty-nine".