202020202111121 has 8 divisors (see below), whose sum is σ = 202059751054824. Its totient is φ = 201980654652160.

The previous prime is 202020202111111. The next prime is 202020202111141. The reversal of 202020202111121 is 121111202020202.

It can be written as a sum of positive squares in 4 ways, for example, as 25350620803600 + 176669581307521 = 5034940^2 + 13291711^2 .

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 202020202111121 - 2¹⁸ = 202020201848977 is a prime.

It is a super-2 number, since 2×202020202111121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 202020202111121.

It is not an unprimeable number, because it can be changed into a prime (202020202111111) 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, 294546041 + ... + 295231113.

It is an arithmetic number, because the mean of its divisors is an integer number (25257468881853).

Almost surely, 2^{202020202111121} is an apocalyptic number.

It is an amenable number.

202020202111121 is a deficient number, since it is larger than the sum of its proper divisors (39548943703).

202020202111121 is an equidigital number, since it uses as much as digits as its factorization.

202020202111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742371.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 202020202111121 its reverse (121111202020202), we get a palindrome (323131404131323).

The spelling of 202020202111121 in words is "two hundred two trillion, twenty billion, two hundred two million, one hundred eleven thousand, one hundred twenty-one".