4121780129 has 2 divisors, whose sum is σ = 4121780130. Its totient is φ = 4121780128.

The previous prime is 4121780099. The next prime is 4121780153. The reversal of 4121780129 is 9210871214.

4121780129 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3055104529 + 1066675600 = 55273^2 + 32660^2 .

It is a cyclic number.

It is not a de Polignac number, because 4121780129 - 2¹² = 4121776033 is a prime.

It is not a weakly prime, because it can be changed into another prime (4121780329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2060890064 + 2060890065.

It is an arithmetic number, because the mean of its divisors is an integer number (2060890065).

Almost surely, 2^4121780129 is an apocalyptic number.

It is an amenable number.

4121780129 is a deficient number, since it is larger than the sum of its proper divisors (1).

4121780129 is an equidigital number, since it uses as much as digits as its factorization.

4121780129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 4121780129 is about 64201.0913380762. The cubic root of 4121780129 is about 1603.3497696381.

The spelling of 4121780129 in words is "four billion, one hundred twenty-one million, seven hundred eighty thousand, one hundred twenty-nine".