202020221121 has 16 divisors (see below), whose sum is σ = 270897515136. Its totient is φ = 133912267776.

The previous prime is 202020221107. The next prime is 202020221173. The reversal of 202020221121 is 121122020202.

202020221121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 202020221121 - 2¹⁷ = 202020090049 is a prime.

It is a super-3 number, since 3×202020221121³ (a number of 35 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 202020221121.

It is not an unprimeable number, because it can be changed into a prime (202020220121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1028956 + ... + 1209458.

It is an arithmetic number, because the mean of its divisors is an integer number (16931094696).

Almost surely, 2^202020221121 is an apocalyptic number.

It is an amenable number.

202020221121 is a deficient number, since it is larger than the sum of its proper divisors (68877294015).

202020221121 is a wasteful number, since it uses less digits than its factorization.

202020221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182632.

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

Adding to 202020221121 its reverse (121122020202), we get a palindrome (323142241323).

The spelling of 202020221121 in words is "two hundred two billion, twenty million, two hundred twenty-one thousand, one hundred twenty-one".