21221222122202 has 16 divisors (see below), whose sum is σ = 32308195603200. Its totient is φ = 10452435486480.

The previous prime is 21221222122181. The next prime is 21221222122249. The reversal of 21221222122202 is 20222122212212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152905049 + ... + 153043772.

It is an arithmetic number, because the mean of its divisors is an integer number (2019262225200).

Almost surely, 2^{21221222122202} is an apocalyptic number.

21221222122202 is a deficient number, since it is larger than the sum of its proper divisors (11086973480998).

21221222122202 is a wasteful number, since it uses less digits than its factorization.

21221222122202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305949341.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 21221222122202 its reverse (20222122212212), we get a palindrome (41443344334414).

The spelling of 21221222122202 in words is "twenty-one trillion, two hundred twenty-one billion, two hundred twenty-two million, one hundred twenty-two thousand, two hundred two".