210201221009 has 32 divisors (see below), whose sum is σ = 235729181184. Its totient is φ = 186191032320.

The previous prime is 210201221003. The next prime is 210201221119. The reversal of 210201221009 is 900122102012.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 210201221009 - 2¹⁶ = 210201155473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (210201221003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8414792 + ... + 8439734.

It is an arithmetic number, because the mean of its divisors is an integer number (7366536912).

Almost surely, 2^210201221009 is an apocalyptic number.

It is an amenable number.

210201221009 is a deficient number, since it is larger than the sum of its proper divisors (25527960175).

210201221009 is a wasteful number, since it uses less digits than its factorization.

210201221009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25257.

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

The spelling of 210201221009 in words is "two hundred ten billion, two hundred one million, two hundred twenty-one thousand, nine".