210202101111221 has 24 divisors (see below), whose sum is σ = 214625046027840. Its totient is φ = 205868538435456.

The previous prime is 210202101111161. The next prime is 210202101111257. The reversal of 210202101111221 is 122111101202012.

It is a de Polignac number, because none of the positive numbers 2^k-210202101111221 is a prime.

It is a super-2 number, since 2×210202101111221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210202101111221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210202901111221) 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 in 23 ways as a sum of consecutive naturals, for example, 4507559321 + ... + 4507605953.

It is an arithmetic number, because the mean of its divisors is an integer number (8942710251160).

Almost surely, 2^{210202101111221} is an apocalyptic number.

It is an amenable number.

210202101111221 is a deficient number, since it is larger than the sum of its proper divisors (4422944916619).

210202101111221 is an equidigital number, since it uses as much as digits as its factorization.

210202101111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49565 (or 49512 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 210202101111221 its reverse (122111101202012), we get a palindrome (332313202313233).

The spelling of 210202101111221 in words is "two hundred ten trillion, two hundred two billion, one hundred one million, one hundred eleven thousand, two hundred twenty-one".