21220112202202 has 8 divisors (see below), whose sum is σ = 31891262677812. Its totient is φ = 10589691309600.

The previous prime is 21220112202077. The next prime is 21220112202287. The reversal of 21220112202202 is 20220221102212.

It can be written as a sum of positive squares in 2 ways, for example, as 20774370367881 + 445741834321 = 4557891^2 + 667639^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 21220112202202.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10182394449 + ... + 10182396532.

Almost surely, 2^{21220112202202} is an apocalyptic number.

21220112202202 is a deficient number, since it is larger than the sum of its proper divisors (10671150475610).

21220112202202 is a wasteful number, since it uses less digits than its factorization.

21220112202202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20364791504.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21220112202202 its reverse (20220221102212), we get a palindrome (41440333304414).

The spelling of 21220112202202 in words is "twenty-one trillion, two hundred twenty billion, one hundred twelve million, two hundred two thousand, two hundred two".