210002010011221 has 4 divisors (see below), whose sum is σ = 210019537943244. Its totient is φ = 209984482079200.

The previous prime is 210002010011207. The next prime is 210002010011243. The reversal of 210002010011221 is 122110010200012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 202831316836996 + 7170693174225 = 14241886^2 + 2677815^2 .

It is a cyclic number.

It is not a de Polignac number, because 210002010011221 - 2²⁹ = 210001473140309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210002010011201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8763948040 + ... + 8763972001.

It is an arithmetic number, because the mean of its divisors is an integer number (52504884485811).

Almost surely, 2^{210002010011221} is an apocalyptic number.

It is an amenable number.

210002010011221 is a deficient number, since it is larger than the sum of its proper divisors (17527932023).

210002010011221 is a wasteful number, since it uses less digits than its factorization.

210002010011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17527932022.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 210002010011221 its reverse (122110010200012), we get a palindrome (332112020211233).

The spelling of 210002010011221 in words is "two hundred ten trillion, two billion, ten million, eleven thousand, two hundred twenty-one".