21222011212201 has 16 divisors (see below), whose sum is σ = 21815161056000. Its totient is φ = 20637082147968.

The previous prime is 21222011212151. The next prime is 21222011212267. The reversal of 21222011212201 is 10221211022212.

It is a cyclic number.

It is not a de Polignac number, because 21222011212201 - 2¹⁵ = 21222011179433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222011212271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30616011 + ... + 31301503.

It is an arithmetic number, because the mean of its divisors is an integer number (1363447566000).

Almost surely, 2^{21222011212201} is an apocalyptic number.

It is an amenable number.

21222011212201 is a deficient number, since it is larger than the sum of its proper divisors (593149843799).

21222011212201 is an equidigital number, since it uses as much as digits as its factorization.

21222011212201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691488.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21222011212201 its reverse (10221211022212), we get a palindrome (31443222234413).

The spelling of 21222011212201 in words is "twenty-one trillion, two hundred twenty-two billion, eleven million, two hundred twelve thousand, two hundred one".