210120901099 has 2 divisors, whose sum is σ = 210120901100. Its totient is φ = 210120901098.

The previous prime is 210120901091. The next prime is 210120901117. The reversal of 210120901099 is 990109021012.

210120901099 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 210120901099 - 2³ = 210120901091 is a prime.

It is not a weakly prime, because it can be changed into another prime (210120901091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105060450549 + 105060450550.

It is an arithmetic number, because the mean of its divisors is an integer number (105060450550).

Almost surely, 2^210120901099 is an apocalyptic number.

210120901099 is a deficient number, since it is larger than the sum of its proper divisors (1).

210120901099 is an equidigital number, since it uses as much as digits as its factorization.

210120901099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 34.

The spelling of 210120901099 in words is "two hundred ten billion, one hundred twenty million, nine hundred one thousand, ninety-nine".