202110120221 has 2 divisors, whose sum is σ = 202110120222. Its totient is φ = 202110120220.

The previous prime is 202110120211. The next prime is 202110120227. The reversal of 202110120221 is 122021011202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199911823225 + 2198296996 = 447115^2 + 46886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202110120221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202110120196 and 202110120205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202110120227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101055060110 + 101055060111.

It is an arithmetic number, because the mean of its divisors is an integer number (101055060111).

Almost surely, 2^202110120221 is an apocalyptic number.

It is an amenable number.

202110120221 is a deficient number, since it is larger than the sum of its proper divisors (1).

202110120221 is an equidigital number, since it uses as much as digits as its factorization.

202110120221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 202110120221 its reverse (122021011202), we get a palindrome (324131131423).

The spelling of 202110120221 in words is "two hundred two billion, one hundred ten million, one hundred twenty thousand, two hundred twenty-one".