200121220120193 has 2 divisors, whose sum is σ = 200121220120194. Its totient is φ = 200121220120192.

The previous prime is 200121220120141. The next prime is 200121220120259. The reversal of 200121220120193 is 391021022121002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107851901321329 + 92269318798864 = 10385177^2 + 9605692^2 .

It is a cyclic number.

It is not a de Polignac number, because 200121220120193 - 2¹⁰ = 200121220119169 is a prime.

It is not a weakly prime, because it can be changed into another prime (200121220120123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100060610060096 + 100060610060097.

It is an arithmetic number, because the mean of its divisors is an integer number (100060610060097).

Almost surely, 2^{200121220120193} is an apocalyptic number.

It is an amenable number.

200121220120193 is a deficient number, since it is larger than the sum of its proper divisors (1).

200121220120193 is an equidigital number, since it uses as much as digits as its factorization.

200121220120193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

Adding to 200121220120193 its reverse (391021022121002), we get a palindrome (591142242241195).

The spelling of 200121220120193 in words is "two hundred trillion, one hundred twenty-one billion, two hundred twenty million, one hundred twenty thousand, one hundred ninety-three".