21010211222222 has 8 divisors (see below), whose sum is σ = 31516497571896. Its totient is φ = 10504712031592.

The previous prime is 21010211222183. The next prime is 21010211222251. The reversal of 21010211222222 is 22222211201012.

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 = 21010211222194 and 21010211222203.

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, 196723028 + ... + 196829799.

It is an arithmetic number, because the mean of its divisors is an integer number (3939562196487).

Almost surely, 2^{21010211222222} is an apocalyptic number.

21010211222222 is a deficient number, since it is larger than the sum of its proper divisors (10506286349674).

21010211222222 is a wasteful number, since it uses less digits than its factorization.

21010211222222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393579522.

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

Adding to 21010211222222 its reverse (22222211201012), we get a palindrome (43232422423234).

The spelling of 21010211222222 in words is "twenty-one trillion, ten billion, two hundred eleven million, two hundred twenty-two thousand, two hundred twenty-two".