201021110010221 has 2 divisors, whose sum is σ = 201021110010222. Its totient is φ = 201021110010220.

The previous prime is 201021110010209. The next prime is 201021110010271. The reversal of 201021110010221 is 122010011120102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123746268256900 + 77274841753321 = 11124130^2 + 8790611^2 .

It is a cyclic number.

It is not a de Polignac number, because 201021110010221 - 2⁶ = 201021110010157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201021110010196 and 201021110010205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201021110010271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100510555005110 + 100510555005111.

It is an arithmetic number, because the mean of its divisors is an integer number (100510555005111).

Almost surely, 2^{201021110010221} is an apocalyptic number.

It is an amenable number.

201021110010221 is a deficient number, since it is larger than the sum of its proper divisors (1).

201021110010221 is an equidigital number, since it uses as much as digits as its factorization.

201021110010221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 201021110010221 its reverse (122010011120102), we get a palindrome (323031121130323).

The spelling of 201021110010221 in words is "two hundred one trillion, twenty-one billion, one hundred ten million, ten thousand, two hundred twenty-one".