210010202111221 has 2 divisors, whose sum is σ = 210010202111222. Its totient is φ = 210010202111220.

The previous prime is 210010202111209. The next prime is 210010202111231. The reversal of 210010202111221 is 122111202010012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 181107374572996 + 28902827538225 = 13457614^2 + 5376135^2 .

It is a cyclic number.

It is not a de Polignac number, because 210010202111221 - 2²⁵ = 210010168556789 is a prime.

It is a super-2 number, since 2×210010202111221² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 210010202111195 and 210010202111204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210010202111201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105005101055610 + 105005101055611.

It is an arithmetic number, because the mean of its divisors is an integer number (105005101055611).

Almost surely, 2^{210010202111221} is an apocalyptic number.

It is an amenable number.

210010202111221 is a deficient number, since it is larger than the sum of its proper divisors (1).

210010202111221 is an equidigital number, since it uses as much as digits as its factorization.

210010202111221 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 16.

Adding to 210010202111221 its reverse (122111202010012), we get a palindrome (332121404121233).

The spelling of 210010202111221 in words is "two hundred ten trillion, ten billion, two hundred two million, one hundred eleven thousand, two hundred twenty-one".