202220110210021 has 2 divisors, whose sum is σ = 202220110210022. Its totient is φ = 202220110210020.

The previous prime is 202220110209967. The next prime is 202220110210037. The reversal of 202220110210021 is 120012011022202.

It is a happy number.

It is an a-pointer prime, because the next prime (202220110210037) can be obtained adding 202220110210021 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186547110150625 + 15673000059396 = 13658225^2 + 3958914^2 .

It is a cyclic number.

It is not a de Polignac number, because 202220110210021 - 2¹⁷ = 202220110078949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202220110209977 and 202220110210004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202220110210051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101110055105010 + 101110055105011.

It is an arithmetic number, because the mean of its divisors is an integer number (101110055105011).

Almost surely, 2^{202220110210021} is an apocalyptic number.

It is an amenable number.

202220110210021 is a deficient number, since it is larger than the sum of its proper divisors (1).

202220110210021 is an equidigital number, since it uses as much as digits as its factorization.

202220110210021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 202220110210021 its reverse (120012011022202), we get a palindrome (322232121232223).

The spelling of 202220110210021 in words is "two hundred two trillion, two hundred twenty billion, one hundred ten million, two hundred ten thousand, twenty-one".