22022121211221 has 8 divisors (see below), whose sum is σ = 29369939663680. Its totient is φ = 14677858449792.

The previous prime is 22022121211217. The next prime is 22022121211273. The reversal of 22022121211221 is 12211212122022.

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

It is not a de Polignac number, because 22022121211221 - 2² = 22022121211217 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 (22022121213221) 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, 888908305 + ... + 888933078.

It is an arithmetic number, because the mean of its divisors is an integer number (3671242457960).

Almost surely, 2^{22022121211221} is an apocalyptic number.

It is an amenable number.

22022121211221 is a deficient number, since it is larger than the sum of its proper divisors (7347818452459).

22022121211221 is a wasteful number, since it uses less digits than its factorization.

22022121211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1777845515.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 22022121211221 its reverse (12211212122022), we get a palindrome (34233333333243).

The spelling of 22022121211221 in words is "twenty-two trillion, twenty-two billion, one hundred twenty-one million, two hundred eleven thousand, two hundred twenty-one".