21202112012222 has 8 divisors (see below), whose sum is σ = 31967951272896. Its totient is φ = 10546128254592.

The previous prime is 21202112012203. The next prime is 21202112012287. The reversal of 21202112012222 is 22221021120212.

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

It is a junction number, because it is equal to n+sod(n) for n = 21202112012194 and 21202112012203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27463875278 + ... + 27463876049.

It is an arithmetic number, because the mean of its divisors is an integer number (3995993909112).

Almost surely, 2^{21202112012222} is an apocalyptic number.

21202112012222 is a deficient number, since it is larger than the sum of its proper divisors (10765839260674).

21202112012222 is a wasteful number, since it uses less digits than its factorization.

21202112012222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54927751522.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21202112012222 its reverse (22221021120212), we get a palindrome (43423133132434).

The spelling of 21202112012222 in words is "twenty-one trillion, two hundred two billion, one hundred twelve million, twelve thousand, two hundred twenty-two".