21220100012222 has 4 divisors (see below), whose sum is σ = 31830150018336. Its totient is φ = 10610050006110.

The previous prime is 21220100012191. The next prime is 21220100012261. The reversal of 21220100012222 is 22221000102212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21220100012222.

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 as a sum of consecutive naturals, namely, 5305025003054 + ... + 5305025003057.

It is an arithmetic number, because the mean of its divisors is an integer number (7957537504584).

Almost surely, 2^{21220100012222} is an apocalyptic number.

21220100012222 is a deficient number, since it is larger than the sum of its proper divisors (10610050006114).

21220100012222 is a wasteful number, since it uses less digits than its factorization.

21220100012222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10610050006113.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21220100012222 its reverse (22221000102212), we get a palindrome (43441100114434).

The spelling of 21220100012222 in words is "twenty-one trillion, two hundred twenty billion, one hundred million, twelve thousand, two hundred twenty-two".