20222221221221 has 8 divisors (see below), whose sum is σ = 20692568861184. Its totient is φ = 19751876464320.

The previous prime is 20222221221217. The next prime is 20222221221287. The reversal of 20222221221221 is 12212212222202.

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

It is a cyclic number.

It is not a de Polignac number, because 20222221221221 - 2² = 20222221221217 is a prime.

It is a super-2 number, since 2×20222221221221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20222221271221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20984060 + ... + 21926586.

It is an arithmetic number, because the mean of its divisors is an integer number (2586571107648).

Almost surely, 2^{20222221221221} is an apocalyptic number.

It is an amenable number.

20222221221221 is a deficient number, since it is larger than the sum of its proper divisors (470347639963).

20222221221221 is an equidigital number, since it uses as much as digits as its factorization.

20222221221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1441531.

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

Adding to 20222221221221 its reverse (12212212222202), we get a palindrome (32434433443423).

The spelling of 20222221221221 in words is "twenty trillion, two hundred twenty-two billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred twenty-one".