22002212221221 has 8 divisors (see below), whose sum is σ = 29413687403680. Its totient is φ = 14629439259792.

The previous prime is 22002212221201. The next prime is 22002212221289. The reversal of 22002212221221 is 12212221220022.

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

It is not a de Polignac number, because 22002212221221 - 2²⁵ = 22002178666789 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 (22002212221201) 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, 9675553930 + ... + 9675556203.

It is an arithmetic number, because the mean of its divisors is an integer number (3676710925460).

Almost surely, 2^{22002212221221} is an apocalyptic number.

It is an amenable number.

22002212221221 is a deficient number, since it is larger than the sum of its proper divisors (7411475182459).

22002212221221 is a wasteful number, since it uses less digits than its factorization.

22002212221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19351110515.

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

Adding to 22002212221221 its reverse (12212221220022), we get a palindrome (34214433441243).

The spelling of 22002212221221 in words is "twenty-two trillion, two billion, two hundred twelve million, two hundred twenty-one thousand, two hundred twenty-one".