20211220010222 has 4 divisors (see below), whose sum is σ = 30316830015336. Its totient is φ = 10105610005110.

The previous prime is 20211220010173. The next prime is 20211220010243. The reversal of 20211220010222 is 22201002211202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20211220010222.

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 as a sum of consecutive naturals, namely, 5052805002554 + ... + 5052805002557.

It is an arithmetic number, because the mean of its divisors is an integer number (7579207503834).

Almost surely, 2^{20211220010222} is an apocalyptic number.

20211220010222 is a deficient number, since it is larger than the sum of its proper divisors (10105610005114).

20211220010222 is a wasteful number, since it uses less digits than its factorization.

20211220010222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10105610005113.

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

Adding to 20211220010222 its reverse (22201002211202), we get a palindrome (42412222221424).

The spelling of 20211220010222 in words is "twenty trillion, two hundred eleven billion, two hundred twenty million, ten thousand, two hundred twenty-two".