22022212212221 has 16 divisors (see below), whose sum is σ = 24224516219904. Its totient is φ = 19892652413184.

The previous prime is 22022212212181. The next prime is 22022212212233. The reversal of 22022212212221 is 12221221222022.

It is a cyclic number.

It is not a de Polignac number, because 22022212212221 - 2⁶ = 22022212212157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22022212212421) by changing a digit.

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, 1278476 + ... + 6758618.

It is an arithmetic number, because the mean of its divisors is an integer number (1514032263744).

Almost surely, 2^{22022212212221} is an apocalyptic number.

It is an amenable number.

22022212212221 is a deficient number, since it is larger than the sum of its proper divisors (2202304007683).

22022212212221 is a wasteful number, since it uses less digits than its factorization.

22022212212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5486780.

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

Adding to 22022212212221 its reverse (12221221222022), we get a palindrome (34243433434243).

The spelling of 22022212212221 in words is "twenty-two trillion, twenty-two billion, two hundred twelve million, two hundred twelve thousand, two hundred twenty-one".