22212221022221 has 16 divisors (see below), whose sum is σ = 22464000216000. Its totient is φ = 21961778160000.

The previous prime is 22212221022161. The next prime is 22212221022307. The reversal of 22212221022221 is 12222012221222.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22212221022221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22212223022221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 309115505 + ... + 309187353.

It is an arithmetic number, because the mean of its divisors is an integer number (1404000013500).

Almost surely, 2^{22212221022221} is an apocalyptic number.

It is an amenable number.

22212221022221 is a deficient number, since it is larger than the sum of its proper divisors (251779193779).

22212221022221 is a wasteful number, since it uses less digits than its factorization.

22212221022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81100.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 22212221022221 its reverse (12222012221222), we get a palindrome (34434233243443).

The spelling of 22212221022221 in words is "twenty-two trillion, two hundred twelve billion, two hundred twenty-one million, twenty-two thousand, two hundred twenty-one".