20211221222102 has 64 divisors (see below), whose sum is σ = 32909063616000. Its totient is φ = 9272348757504.

The previous prime is 20211221222077. The next prime is 20211221222111. The reversal of 20211221222102 is 20122212211202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2073153524 + ... + 2073163272.

It is an arithmetic number, because the mean of its divisors is an integer number (514204119000).

Almost surely, 2^{20211221222102} is an apocalyptic number.

20211221222102 is a deficient number, since it is larger than the sum of its proper divisors (12697842393898).

20211221222102 is a wasteful number, since it uses less digits than its factorization.

20211221222102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12357.

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

Adding to 20211221222102 its reverse (20122212211202), we get a palindrome (40333433433304).

The spelling of 20211221222102 in words is "twenty trillion, two hundred eleven billion, two hundred twenty-one million, two hundred twenty-two thousand, one hundred two".