21222002220202 has 16 divisors (see below), whose sum is σ = 36598422994560. Its totient is φ = 9040681868688.

The previous prime is 21222002220193. The next prime is 21222002220233. The reversal of 21222002220202 is 20202220022212.

It is a self number, because there is not a number n which added to its sum of digits gives 21222002220202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4538492577 + ... + 4538497252.

It is an arithmetic number, because the mean of its divisors is an integer number (2287401437160).

Almost surely, 2^{21222002220202} is an apocalyptic number.

21222002220202 is a deficient number, since it is larger than the sum of its proper divisors (15376420774358).

21222002220202 is a wasteful number, since it uses less digits than its factorization.

21222002220202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9076990005.

The product of its (nonzero) digits is 512, while the sum is 19.

Adding to 21222002220202 its reverse (20202220022212), we get a palindrome (41424222242414).

The spelling of 21222002220202 in words is "twenty-one trillion, two hundred twenty-two billion, two million, two hundred twenty thousand, two hundred two".