210011011209 has 12 divisors (see below), whose sum is σ = 303360022836. Its totient is φ = 140002363392.

The previous prime is 210011011207. The next prime is 210011011237. The reversal of 210011011209 is 902110110012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 24008572809 + 186002438400 = 154947^2 + 431280^2 .

It is not a de Polignac number, because 210011011209 - 2¹ = 210011011207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210011011191 and 210011011200.

It is not an unprimeable number, because it can be changed into a prime (210011011207) 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 in 11 ways as a sum of consecutive naturals, for example, 137832 + ... + 662585.

It is an arithmetic number, because the mean of its divisors is an integer number (25280001903).

Almost surely, 2^210011011209 is an apocalyptic number.

It is an amenable number.

210011011209 is a deficient number, since it is larger than the sum of its proper divisors (93349011627).

210011011209 is a wasteful number, since it uses less digits than its factorization.

210011011209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829576 (or 829573 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

The spelling of 210011011209 in words is "two hundred ten billion, eleven million, eleven thousand, two hundred nine".