200121241 has 2 divisors, whose sum is σ = 200121242. Its totient is φ = 200121240.
The previous prime is 200121227. The next prime is 200121247. The reversal of 200121241 is 142121002.
It is a happy number.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 144096016 + 56025225 = 12004^2 + 7485^2 .
It is a cyclic number.
It is not a de Polignac number, because 200121241 - 25 = 200121209 is a prime.
It is a super-2 number, since 2×2001212412 = 80097022198760162, which contains 22 as substring.
It is not a weakly prime, because it can be changed into another prime (200121247) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100060620 + 100060621.
It is an arithmetic number, because the mean of its divisors is an integer number (100060621).
Almost surely, 2200121241 is an apocalyptic number.
It is an amenable number.
200121241 is a deficient number, since it is larger than the sum of its proper divisors (1).
200121241 is an equidigital number, since it uses as much as digits as its factorization.
200121241 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 32, while the sum is 13.
The square root of 200121241 is about 14146.4214909637. The cubic root of 200121241 is about 584.9216940503.
Adding to 200121241 its reverse (142121002), we get a palindrome (342242243).
The spelling of 200121241 in words is "two hundred million, one hundred twenty-one thousand, two hundred forty-one".
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