202102020331243 has 2 divisors, whose sum is σ = 202102020331244. Its totient is φ = 202102020331242.

The previous prime is 202102020331199. The next prime is 202102020331259. The reversal of 202102020331243 is 342133020201202.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202102020331243 is a prime.

It is not a weakly prime, because it can be changed into another prime (202102020331843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101051010165621 + 101051010165622.

It is an arithmetic number, because the mean of its divisors is an integer number (101051010165622).

Almost surely, 2^{202102020331243} is an apocalyptic number.

202102020331243 is a deficient number, since it is larger than the sum of its proper divisors (1).

202102020331243 is an equidigital number, since it uses as much as digits as its factorization.

202102020331243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 202102020331243 its reverse (342133020201202), we get a palindrome (544235040532445).

The spelling of 202102020331243 in words is "two hundred two trillion, one hundred two billion, twenty million, three hundred thirty-one thousand, two hundred forty-three".