20220121221 has 8 divisors (see below), whose sum is σ = 27417113760. Its totient is φ = 13251604752.

The previous prime is 20220121193. The next prime is 20220121247. The reversal of 20220121221 is 12212102202.

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

It is not a de Polignac number, because 20220121221 - 2¹⁴ = 20220104837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20220121221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20220129221) 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, 57118810 + ... + 57119163.

It is an arithmetic number, because the mean of its divisors is an integer number (3427139220).

Almost surely, 2^20220121221 is an apocalyptic number.

It is an amenable number.

20220121221 is a deficient number, since it is larger than the sum of its proper divisors (7196992539).

20220121221 is a wasteful number, since it uses less digits than its factorization.

20220121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114238035.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20220121221 its reverse (12212102202), we get a palindrome (32432223423).

The spelling of 20220121221 in words is "twenty billion, two hundred twenty million, one hundred twenty-one thousand, two hundred twenty-one".