1100120999 has 2 divisors, whose sum is σ = 1100121000. Its totient is φ = 1100120998.

The previous prime is 1100120971. The next prime is 1100121007. The reversal of 1100120999 is 9990210011.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1100120999 - 2²⁴ = 1083343783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1100120929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550060499 + 550060500.

It is an arithmetic number, because the mean of its divisors is an integer number (550060500).

Almost surely, 2^1100120999 is an apocalyptic number.

1100120999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100120999 is an equidigital number, since it uses as much as digits as its factorization.

1100120999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 32.

The square root of 1100120999 is about 33168.0719819528. The cubic root of 1100120999 is about 1032.3179640267.

The spelling of 1100120999 in words is "one billion, one hundred million, one hundred twenty thousand, nine hundred ninety-nine".