201343010021 has 2 divisors, whose sum is σ = 201343010022. Its totient is φ = 201343010020.

The previous prime is 201343010009. The next prime is 201343010027. The reversal of 201343010021 is 120010343102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201336177025 + 6832996 = 448705^2 + 2614^2 .

It is a cyclic number.

It is not a de Polignac number, because 201343010021 - 2¹⁴ = 201342993637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201343010027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100671505010 + 100671505011.

It is an arithmetic number, because the mean of its divisors is an integer number (100671505011).

Almost surely, 2^201343010021 is an apocalyptic number.

It is an amenable number.

201343010021 is a deficient number, since it is larger than the sum of its proper divisors (1).

201343010021 is an equidigital number, since it uses as much as digits as its factorization.

201343010021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 201343010021 its reverse (120010343102), we get a palindrome (321353353123).

The spelling of 201343010021 in words is "two hundred one billion, three hundred forty-three million, ten thousand, twenty-one".