20001212200243 has 2 divisors, whose sum is σ = 20001212200244. Its totient is φ = 20001212200242.

The previous prime is 20001212200199. The next prime is 20001212200247. The reversal of 20001212200243 is 34200221210002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20001212200243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20001212200243.

It is not a weakly prime, because it can be changed into another prime (20001212200247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000606100121 + 10000606100122.

It is an arithmetic number, because the mean of its divisors is an integer number (10000606100122).

Almost surely, 2^{20001212200243} is an apocalyptic number.

20001212200243 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001212200243 is an equidigital number, since it uses as much as digits as its factorization.

20001212200243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 20001212200243 its reverse (34200221210002), we get a palindrome (54201433410245).

The spelling of 20001212200243 in words is "twenty trillion, one billion, two hundred twelve million, two hundred thousand, two hundred forty-three".