121000010210129 has 2 divisors, whose sum is σ = 121000010210130. Its totient is φ = 121000010210128.

The previous prime is 121000010210083. The next prime is 121000010210153. The reversal of 121000010210129 is 921012010000121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84983784382225 + 36016225827904 = 9218665^2 + 6001352^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121000010210129 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121000010210129.

It is not a weakly prime, because it can be changed into another prime (121000010210329) 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, 60500005105064 + 60500005105065.

It is an arithmetic number, because the mean of its divisors is an integer number (60500005105065).

Almost surely, 2^{121000010210129} is an apocalyptic number.

It is an amenable number.

121000010210129 is a deficient number, since it is larger than the sum of its proper divisors (1).

121000010210129 is an equidigital number, since it uses as much as digits as its factorization.

121000010210129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 121000010210129 in words is "one hundred twenty-one trillion, ten million, two hundred ten thousand, one hundred twenty-nine".