21220221122202 has 16 divisors (see below), whose sum is σ = 44936938847232. Its totient is φ = 6657324273600.

The previous prime is 21220221122201. The next prime is 21220221122227. The reversal of 21220221122202 is 20222112202212.

It is not an unprimeable number, because it can be changed into a prime (21220221122201) 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, 104020691674 + ... + 104020691877.

It is an arithmetic number, because the mean of its divisors is an integer number (2808558677952).

Almost surely, 2^{21220221122202} is an apocalyptic number.

21220221122202 is an abundant number, since it is smaller than the sum of its proper divisors (23716717725030).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21220221122202 is a wasteful number, since it uses less digits than its factorization.

21220221122202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208041383573.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 21220221122202 its reverse (20222112202212), we get a palindrome (41442333324414).

The spelling of 21220221122202 in words is "twenty-one trillion, two hundred twenty billion, two hundred twenty-one million, one hundred twenty-two thousand, two hundred two".