202220112211121 has 4 divisors (see below), whose sum is σ = 202220163814644. Its totient is φ = 202220060607600.

The previous prime is 202220112211063. The next prime is 202220112211163. The reversal of 202220112211121 is 121112211022202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 91087191569521 + 111132920641600 = 9543961^2 + 10541960^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202220112211121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 202220112211093 and 202220112211102.

It is not an unprimeable number, because it can be changed into a prime (202220112211171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19393070 + ... + 27937991.

It is an arithmetic number, because the mean of its divisors is an integer number (50555040953661).

Almost surely, 2^{202220112211121} is an apocalyptic number.

It is an amenable number.

202220112211121 is a deficient number, since it is larger than the sum of its proper divisors (51603523).

202220112211121 is an equidigital number, since it uses as much as digits as its factorization.

202220112211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51603522.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 202220112211121 its reverse (121112211022202), we get a palindrome (323332323233323).

The spelling of 202220112211121 in words is "two hundred two trillion, two hundred twenty billion, one hundred twelve million, two hundred eleven thousand, one hundred twenty-one".