21201010022209 has 16 divisors (see below), whose sum is σ = 21487975142400. Its totient is φ = 20914517916864.

The previous prime is 21201010022201. The next prime is 21201010022249. The reversal of 21201010022209 is 90222001010212.

It is a cyclic number.

It is not a de Polignac number, because 21201010022209 - 2³ = 21201010022201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21201010022209.

It is not an unprimeable number, because it can be changed into a prime (21201010022201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 452245479 + ... + 452292355.

It is an arithmetic number, because the mean of its divisors is an integer number (1342998446400).

Almost surely, 2^{21201010022209} is an apocalyptic number.

It is an amenable number.

21201010022209 is a deficient number, since it is larger than the sum of its proper divisors (286965120191).

21201010022209 is a wasteful number, since it uses less digits than its factorization.

21201010022209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51792.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 21201010022209 in words is "twenty-one trillion, two hundred one billion, ten million, twenty-two thousand, two hundred nine".