200121220212073 has 2 divisors, whose sum is σ = 200121220212074. Its totient is φ = 200121220212072.

The previous prime is 200121220212059. The next prime is 200121220212161. The reversal of 200121220212073 is 370212022121002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191006690147289 + 9114530064784 = 13820517^2 + 3019028^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200121220212073 is a prime.

It is not a weakly prime, because it can be changed into another prime (200121220212013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100060610106036 + 100060610106037.

It is an arithmetic number, because the mean of its divisors is an integer number (100060610106037).

Almost surely, 2^{200121220212073} is an apocalyptic number.

It is an amenable number.

200121220212073 is a deficient number, since it is larger than the sum of its proper divisors (1).

200121220212073 is an equidigital number, since it uses as much as digits as its factorization.

200121220212073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 25.

Adding to 200121220212073 its reverse (370212022121002), we get a palindrome (570333242333075).

The spelling of 200121220212073 in words is "two hundred trillion, one hundred twenty-one billion, two hundred twenty million, two hundred twelve thousand, seventy-three".