21202222102212 has 24 divisors (see below), whose sum is σ = 49471989652512. Its totient is φ = 7067387641600.

The previous prime is 21202222102181. The next prime is 21202222102219. The reversal of 21202222102212 is 21220122220212.

It is not an unprimeable number, because it can be changed into a prime (21202222102219) 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, 2396287 + ... + 6938777.

It is an arithmetic number, because the mean of its divisors is an integer number (2061332902188).

Almost surely, 2^{21202222102212} is an apocalyptic number.

It is an amenable number.

21202222102212 is an abundant number, since it is smaller than the sum of its proper divisors (28269767550300).

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

21202222102212 is a wasteful number, since it uses less digits than its factorization.

21202222102212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4931459 (or 4931457 counting only the distinct ones).

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

Adding to 21202222102212 its reverse (21220122220212), we get a palindrome (42422344322424).

The spelling of 21202222102212 in words is "twenty-one trillion, two hundred two billion, two hundred twenty-two million, one hundred two thousand, two hundred twelve".