21220202122222 has 8 divisors (see below), whose sum is σ = 31855190054400. Its totient is φ = 10601805437424.

The previous prime is 21220202122129. The next prime is 21220202122241. The reversal of 21220202122222 is 22222120202212.

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

It is a junction number, because it is equal to n+sod(n) for n = 21220202122193 and 21220202122202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4147808647 + ... + 4147813762.

It is an arithmetic number, because the mean of its divisors is an integer number (3981898756800).

Almost surely, 2^{21220202122222} is an apocalyptic number.

21220202122222 is a deficient number, since it is larger than the sum of its proper divisors (10634987932178).

21220202122222 is a wasteful number, since it uses less digits than its factorization.

21220202122222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8295623690.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 21220202122222 its reverse (22222120202212), we get a palindrome (43442322324434).

The spelling of 21220202122222 in words is "twenty-one trillion, two hundred twenty billion, two hundred two million, one hundred twenty-two thousand, two hundred twenty-two".