200122121 has 2 divisors, whose sum is σ = 200122122. Its totient is φ = 200122120.

The previous prime is 200122093. The next prime is 200122133. The reversal of 200122121 is 121221002.

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., 190136521 + 9985600 = 13789^2 + 3160^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200122121 is a prime.

It is a super-3 number, since 3×200122121³ (a number of 26 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (200122621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100061060 + 100061061.

It is an arithmetic number, because the mean of its divisors is an integer number (100061061).

Almost surely, 2^200122121 is an apocalyptic number.

It is an amenable number.

200122121 is a deficient number, since it is larger than the sum of its proper divisors (1).

200122121 is an equidigital number, since it uses as much as digits as its factorization.

200122121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 200122121 is about 14146.4525942018. The cubic root of 200122121 is about 584.9225514145.

Adding to 200122121 its reverse (121221002), we get a palindrome (321343123).

The spelling of 200122121 in words is "two hundred million, one hundred twenty-two thousand, one hundred twenty-one".