202043340221 has 2 divisors, whose sum is σ = 202043340222. Its totient is φ = 202043340220.

The previous prime is 202043340151. The next prime is 202043340253. The reversal of 202043340221 is 122043340202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197144880100 + 4898460121 = 444010^2 + 69989^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202043340221 is a prime.

It is a super-2 number, since 2×202043340221² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202043346221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101021670110 + 101021670111.

It is an arithmetic number, because the mean of its divisors is an integer number (101021670111).

Almost surely, 2^202043340221 is an apocalyptic number.

It is an amenable number.

202043340221 is a deficient number, since it is larger than the sum of its proper divisors (1).

202043340221 is an equidigital number, since it uses as much as digits as its factorization.

202043340221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 202043340221 its reverse (122043340202), we get a palindrome (324086680423).

The spelling of 202043340221 in words is "two hundred two billion, forty-three million, three hundred forty thousand, two hundred twenty-one".