21222010000001 has 8 divisors (see below), whose sum is σ = 21234404295720. Its totient is φ = 21209619218688.

The previous prime is 21222009999989. The next prime is 21222010000031. The reversal of 21222010000001 is 10000001022212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12222016000000 + 8999994000001 = 3496000^2 + 2999999^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21222010000001 - 2²⁶ = 21221942891137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21222010000031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11250905 + ... + 13001033.

It is an arithmetic number, because the mean of its divisors is an integer number (2654300536965).

Almost surely, 2^{21222010000001} is an apocalyptic number.

It is an amenable number.

21222010000001 is a deficient number, since it is larger than the sum of its proper divisors (12394295719).

21222010000001 is a wasteful number, since it uses less digits than its factorization.

21222010000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1757203.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21222010000001 its reverse (10000001022212), we get a palindrome (31222011022213).

The spelling of 21222010000001 in words is "twenty-one trillion, two hundred twenty-two billion, ten million, one", and thus it is an aban number.