20220120121 has 8 divisors (see below), whose sum is σ = 20814586184. Its totient is φ = 19628179200.

The previous prime is 20220120097. The next prime is 20220120187. The reversal of 20220120121 is 12102102202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1998090000 + 18222030121 = 44700^2 + 134989^2 .

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 20220120121 - 2¹⁹ = 20219595833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20220120191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 615030 + ... + 647071.

It is an arithmetic number, because the mean of its divisors is an integer number (2601823273).

Almost surely, 2^20220120121 is an apocalyptic number.

It is an amenable number.

20220120121 is a deficient number, since it is larger than the sum of its proper divisors (594466063).

20220120121 is a wasteful number, since it uses less digits than its factorization.

20220120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1262571.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20220120121 its reverse (12102102202), we get a palindrome (32322222323).

The spelling of 20220120121 in words is "twenty billion, two hundred twenty million, one hundred twenty thousand, one hundred twenty-one".