1021120099 has 2 divisors, whose sum is σ = 1021120100. Its totient is φ = 1021120098.

The previous prime is 1021120081. The next prime is 1021120103. The reversal of 1021120099 is 9900211201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1021120099 - 2⁷ = 1021119971 is a prime.

It is not a weakly prime, because it can be changed into another prime (1021120039) 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, 510560049 + 510560050.

It is an arithmetic number, because the mean of its divisors is an integer number (510560050).

Almost surely, 2^1021120099 is an apocalyptic number.

1021120099 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021120099 is an equidigital number, since it uses as much as digits as its factorization.

1021120099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 1021120099 is about 31954.9698638569. The cubic root of 1021120099 is about 1006.9910444031.

The spelling of 1021120099 in words is "one billion, twenty-one million, one hundred twenty thousand, ninety-nine".