20211221200022 has 8 divisors (see below), whose sum is σ = 30475558668672. Its totient is φ = 10052701643800.

The previous prime is 20211221199997. The next prime is 20211221200039. The reversal of 20211221200022 is 22000212211202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26454477629 + ... + 26454478392.

It is an arithmetic number, because the mean of its divisors is an integer number (3809444833584).

Almost surely, 2^{20211221200022} is an apocalyptic number.

20211221200022 is a deficient number, since it is larger than the sum of its proper divisors (10264337468650).

20211221200022 is a wasteful number, since it uses less digits than its factorization.

20211221200022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52908956214.

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

Adding to 20211221200022 its reverse (22000212211202), we get a palindrome (42211433411224).

The spelling of 20211221200022 in words is "twenty trillion, two hundred eleven billion, two hundred twenty-one million, two hundred thousand, twenty-two".