200121010221001 has 2 divisors, whose sum is σ = 200121010221002. Its totient is φ = 200121010221000.

The previous prime is 200121010220959. The next prime is 200121010221023. The reversal of 200121010221001 is 100122010121002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 182551876902976 + 17569133318025 = 13511176^2 + 4191555^2 .

It is a cyclic number.

It is not a de Polignac number, because 200121010221001 - 2¹¹ = 200121010218953 is a prime.

It is a super-2 number, since 2×200121010221001² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (200121010221701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100060505110500 + 100060505110501.

It is an arithmetic number, because the mean of its divisors is an integer number (100060505110501).

Almost surely, 2^{200121010221001} is an apocalyptic number.

It is an amenable number.

200121010221001 is a deficient number, since it is larger than the sum of its proper divisors (1).

200121010221001 is an equidigital number, since it uses as much as digits as its factorization.

200121010221001 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 13.

Adding to 200121010221001 its reverse (100122010121002), we get a palindrome (300243020342003).

Subtracting from 200121010221001 its reverse (100122010121002), we obtain a palindrome (99999000099999).

The spelling of 200121010221001 in words is "two hundred trillion, one hundred twenty-one billion, ten million, two hundred twenty-one thousand, one".