198229121 has 2 divisors, whose sum is σ = 198229122. Its totient is φ = 198229120.

The previous prime is 198229117. The next prime is 198229189. The reversal of 198229121 is 121922891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164762896 + 33466225 = 12836^2 + 5785^2 .

It is an emirp because it is prime and its reverse (121922891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198229121 - 2² = 198229117 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (198229021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99114560 + 99114561.

It is an arithmetic number, because the mean of its divisors is an integer number (99114561).

Almost surely, 2^198229121 is an apocalyptic number.

It is an amenable number.

198229121 is a deficient number, since it is larger than the sum of its proper divisors (1).

198229121 is an equidigital number, since it uses as much as digits as its factorization.

198229121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 35.

The square root of 198229121 is about 14079.3863857769. The cubic root of 198229121 is about 583.0724009226.

The spelling of 198229121 in words is "one hundred ninety-eight million, two hundred twenty-nine thousand, one hundred twenty-one".