21222102210001 has 16 divisors (see below), whose sum is σ = 27609104176128. Its totient is φ = 15817715931600.

The previous prime is 21222102209969. The next prime is 21222102210041. The reversal of 21222102210001 is 10001220122212.

It is a happy number.

It is not a de Polignac number, because 21222102210001 - 2⁵ = 21222102209969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222102210041) 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, 5991557295 + ... + 5991560836.

It is an arithmetic number, because the mean of its divisors is an integer number (1725569011008).

Almost surely, 2^{21222102210001} is an apocalyptic number.

It is an amenable number.

21222102210001 is a deficient number, since it is larger than the sum of its proper divisors (6387001966127).

21222102210001 is a wasteful number, since it uses less digits than its factorization.

21222102210001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11983118172.

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

Adding to 21222102210001 its reverse (10001220122212), we get a palindrome (31223322332213).

The spelling of 21222102210001 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred two million, two hundred ten thousand, one".