200220121 has 2 divisors, whose sum is σ = 200220122. Its totient is φ = 200220120.

The previous prime is 200220113. The next prime is 200220127. The reversal of 200220121 is 121022002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100220121 + 100000000 = 10011^2 + 10000^2 .

It is a cyclic number.

It is not a de Polignac number, because 200220121 - 2³ = 200220113 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 200220098 and 200220107.

It is not a weakly prime, because it can be changed into another prime (200220127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100110060 + 100110061.

It is an arithmetic number, because the mean of its divisors is an integer number (100110061).

Almost surely, 2^200220121 is an apocalyptic number.

It is an amenable number.

200220121 is a deficient number, since it is larger than the sum of its proper divisors (1).

200220121 is an equidigital number, since it uses as much as digits as its factorization.

200220121 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 10.

The square root of 200220121 is about 14149.9159361461. The cubic root of 200220121 is about 585.0180148834.

Adding to 200220121 its reverse (121022002), we get a palindrome (321242123).

The spelling of 200220121 in words is "two hundred million, two hundred twenty thousand, one hundred twenty-one".