211020222202121 has 4 divisors (see below), whose sum is σ = 211052782033044. Its totient is φ = 210987662371200.

The previous prime is 211020222202103. The next prime is 211020222202129. The reversal of 211020222202121 is 121202222020112.

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 110918916558025 + 100101305644096 = 10531805^2 + 10005064^2 .

It is a cyclic number.

It is not a de Polignac number, because 211020222202121 - 2¹⁰ = 211020222201097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211020222202093 and 211020222202102.

It is not an unprimeable number, because it can be changed into a prime (211020222202129) 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, 16279905740 + ... + 16279918701.

It is an arithmetic number, because the mean of its divisors is an integer number (52763195508261).

Almost surely, 2^{211020222202121} is an apocalyptic number.

It is an amenable number.

211020222202121 is a deficient number, since it is larger than the sum of its proper divisors (32559830923).

211020222202121 is an equidigital number, since it uses as much as digits as its factorization.

211020222202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32559830922.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 211020222202121 its reverse (121202222020112), we get a palindrome (332222444222233).

The spelling of 211020222202121 in words is "two hundred eleven trillion, twenty billion, two hundred twenty-two million, two hundred two thousand, one hundred twenty-one".