1001210009 has 4 divisors (see below), whose sum is σ = 1001274420. Its totient is φ = 1001145600.

The previous prime is 1001210003. The next prime is 1001210029. The reversal of 1001210009 is 9000121001.

1001210009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 376360000 + 624850009 = 19400^2 + 24997^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001210009 - 2¹² = 1001205913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001209975 and 1001210002.

It is not an unprimeable number, because it can be changed into a prime (1001210003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7109 + ... + 45309.

It is an arithmetic number, because the mean of its divisors is an integer number (250318605).

Almost surely, 2^1001210009 is an apocalyptic number.

It is an amenable number.

1001210009 is a deficient number, since it is larger than the sum of its proper divisors (64411).

1001210009 is an equidigital number, since it uses as much as digits as its factorization.

1001210009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64410.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 1001210009 is about 31641.9027398796. The cubic root of 1001210009 is about 1000.4031737624.

The spelling of 1001210009 in words is "one billion, one million, two hundred ten thousand, nine".