21010221020222 has 32 divisors (see below), whose sum is σ = 36061776571392. Its totient is φ = 8993318556384.

The previous prime is 21010221020161. The next prime is 21010221020291. The reversal of 21010221020222 is 22202012201012.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21010221020222.

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 15 ways as a sum of consecutive naturals, for example, 151232363 + ... + 151371225.

It is an arithmetic number, because the mean of its divisors is an integer number (1126930517856).

Almost surely, 2^{21010221020222} is an apocalyptic number.

21010221020222 is a deficient number, since it is larger than the sum of its proper divisors (15051555551170).

21010221020222 is a wasteful number, since it uses less digits than its factorization.

21010221020222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152072.

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

Adding to 21010221020222 its reverse (22202012201012), we get a palindrome (43212233221234).

The spelling of 21010221020222 in words is "twenty-one trillion, ten billion, two hundred twenty-one million, twenty thousand, two hundred twenty-two".