21221201222202 has 8 divisors (see below), whose sum is σ = 42442402444416. Its totient is φ = 7073733740732.

The previous prime is 21221201222201. The next prime is 21221201222203. The reversal of 21221201222202 is 20222210212212.

It is an interprime number because it is at equal distance from previous prime (21221201222201) and next prime (21221201222203).

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

21221201222202 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (21221201222201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1768433435178 + ... + 1768433435189.

It is an arithmetic number, because the mean of its divisors is an integer number (5305300305552).

Almost surely, 2^{21221201222202} is an apocalyptic number.

21221201222202 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21221201222202 is a wasteful number, since it uses less digits than its factorization.

21221201222202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3536866870372.

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

Adding to 21221201222202 its reverse (20222210212212), we get a palindrome (41443411434414).

The spelling of 21221201222202 in words is "twenty-one trillion, two hundred twenty-one billion, two hundred one million, two hundred twenty-two thousand, two hundred two".