21222001202210 has 16 divisors (see below), whose sum is σ = 38205523780992. Its totient is φ = 8487484566000.

The previous prime is 21222001202209. The next prime is 21222001202251. The reversal of 21222001202210 is 1220210022212.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164421626 + ... + 164550645.

It is an arithmetic number, because the mean of its divisors is an integer number (2387845236312).

Almost surely, 2^{21222001202210} is an apocalyptic number.

21222001202210 is a deficient number, since it is larger than the sum of its proper divisors (16983522578782).

21222001202210 is a wasteful number, since it uses less digits than its factorization.

21222001202210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328978729.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21222001202210 its reverse (1220210022212), we get a palindrome (22442211224422).

The spelling of 21222001202210 in words is "twenty-one trillion, two hundred twenty-two billion, one million, two hundred two thousand, two hundred ten".