121110200129 has 2 divisors, whose sum is σ = 121110200130. Its totient is φ = 121110200128.

The previous prime is 121110200069. The next prime is 121110200209. The reversal of 121110200129 is 921002011121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116171905600 + 4938294529 = 340840^2 + 70273^2 .

It is a cyclic number.

It is not a de Polignac number, because 121110200129 - 2³⁶ = 52390723393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121110200129.

It is not a weakly prime, because it can be changed into another prime (121110200329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60555100064 + 60555100065.

It is an arithmetic number, because the mean of its divisors is an integer number (60555100065).

Almost surely, 2^121110200129 is an apocalyptic number.

It is an amenable number.

121110200129 is a deficient number, since it is larger than the sum of its proper divisors (1).

121110200129 is an equidigital number, since it uses as much as digits as its factorization.

121110200129 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 121110200129 in words is "one hundred twenty-one billion, one hundred ten million, two hundred thousand, one hundred twenty-nine".