202121220110210 has 16 divisors (see below), whose sum is σ = 363831313408056. Its totient is φ = 80845573108608.

The previous prime is 202121220110143. The next prime is 202121220110213. The reversal of 202121220110210 is 12011022121202.

It can be written as a sum of positive squares in 4 ways, for example, as 180821029074841 + 21300191035369 = 13446971^2 + 4615213^2 .

It is not an unprimeable number, because it can be changed into a prime (202121220110213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364075697 + ... + 364630436.

Almost surely, 2^{202121220110210} is an apocalyptic number.

202121220110210 is a deficient number, since it is larger than the sum of its proper divisors (161710093297846).

202121220110210 is a wasteful number, since it uses less digits than its factorization.

202121220110210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728733877.

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

Adding to 202121220110210 its reverse (12011022121202), we get a palindrome (214132242231412).

The spelling of 202121220110210 in words is "two hundred two trillion, one hundred twenty-one billion, two hundred twenty million, one hundred ten thousand, two hundred ten".