201020021210009 has 16 divisors (see below), whose sum is σ = 202639604993280. Its totient is φ = 199406101968000.

The previous prime is 201020021209991. The next prime is 201020021210011. The reversal of 201020021210009 is 900012120020102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 201020021210009 - 2²⁸ = 201019752774553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201020021210039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1097832554 + ... + 1098015644.

It is an arithmetic number, because the mean of its divisors is an integer number (12664975312080).

Almost surely, 2^{201020021210009} is an apocalyptic number.

It is an amenable number.

201020021210009 is a deficient number, since it is larger than the sum of its proper divisors (1619583783271).

201020021210009 is a wasteful number, since it uses less digits than its factorization.

201020021210009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198512.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 201020021210009 in words is "two hundred one trillion, twenty billion, twenty-one million, two hundred ten thousand, nine".