21220222210202 has 32 divisors (see below), whose sum is σ = 34115004406224. Its totient is φ = 9864281088000.

The previous prime is 21220222210199. The next prime is 21220222210247. The reversal of 21220222210202 is 20201222202212.

It can be written as a sum of positive squares in 8 ways, for example, as 8833194140761 + 12387028069441 = 2972069^2 + 3519521^2 .

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 15 ways as a sum of consecutive naturals, for example, 5648699 + ... + 8622542.

Almost surely, 2^{21220222210202} is an apocalyptic number.

21220222210202 is a deficient number, since it is larger than the sum of its proper divisors (12894782196022).

21220222210202 is a wasteful number, since it uses less digits than its factorization.

21220222210202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14271794.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 21220222210202 its reverse (20201222202212), we get a palindrome (41421444412414).

The spelling of 21220222210202 in words is "twenty-one trillion, two hundred twenty billion, two hundred twenty-two million, two hundred ten thousand, two hundred two".