200121221101247 has 2 divisors, whose sum is σ = 200121221101248. Its totient is φ = 200121221101246.

The previous prime is 200121221101213. The next prime is 200121221101289. The reversal of 200121221101247 is 742101122121002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 200121221101247 - 2¹⁶ = 200121221035711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200121221100247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100060610550623 + 100060610550624.

It is an arithmetic number, because the mean of its divisors is an integer number (100060610550624).

Almost surely, 2^{200121221101247} is an apocalyptic number.

200121221101247 is a deficient number, since it is larger than the sum of its proper divisors (1).

200121221101247 is an equidigital number, since it uses as much as digits as its factorization.

200121221101247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 26.

Adding to 200121221101247 its reverse (742101122121002), we get a palindrome (942222343222249).

The spelling of 200121221101247 in words is "two hundred trillion, one hundred twenty-one billion, two hundred twenty-one million, one hundred one thousand, two hundred forty-seven".