201230129 has 2 divisors, whose sum is σ = 201230130. Its totient is φ = 201230128.

The previous prime is 201230093. The next prime is 201230131. The reversal of 201230129 is 921032102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189805729 + 11424400 = 13777^2 + 3380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201230129 is a prime.

Together with 201230131, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201230129.

It is not a weakly prime, because it can be changed into another prime (201230149) 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, 100615064 + 100615065.

It is an arithmetic number, because the mean of its divisors is an integer number (100615065).

Almost surely, 2^201230129 is an apocalyptic number.

It is an amenable number.

201230129 is a deficient number, since it is larger than the sum of its proper divisors (1).

201230129 is an equidigital number, since it uses as much as digits as its factorization.

201230129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 201230129 is about 14185.5605810979. The cubic root of 201230129 is about 586.0000708608. Note that the first 4 decimals are identical.

The spelling of 201230129 in words is "two hundred one million, two hundred thirty thousand, one hundred twenty-nine".