21011022202201 has 16 divisors (see below), whose sum is σ = 21828066125184. Its totient is φ = 20211219834624.

The previous prime is 21011022202187. The next prime is 21011022202207. The reversal of 21011022202201 is 10220222011012.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21011022202201 - 2²³ = 21011013813593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21011022202207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13008301 + ... + 14534026.

It is an arithmetic number, because the mean of its divisors is an integer number (1364254132824).

Almost surely, 2^{21011022202201} is an apocalyptic number.

It is an amenable number.

21011022202201 is a deficient number, since it is larger than the sum of its proper divisors (817043922983).

21011022202201 is a wasteful number, since it uses less digits than its factorization.

21011022202201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27542640.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21011022202201 its reverse (10220222011012), we get a palindrome (31231244213213).

The spelling of 21011022202201 in words is "twenty-one trillion, eleven billion, twenty-two million, two hundred two thousand, two hundred one".