4321512109 has 2 divisors, whose sum is σ = 4321512110. Its totient is φ = 4321512108.

The previous prime is 4321512101. The next prime is 4321512157. The reversal of 4321512109 is 9012151234.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3368061225 + 953450884 = 58035^2 + 30878^2 .

It is a cyclic number.

It is not a de Polignac number, because 4321512109 - 2³ = 4321512101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4321512101) 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, 2160756054 + 2160756055.

It is an arithmetic number, because the mean of its divisors is an integer number (2160756055).

Almost surely, 2^4321512109 is an apocalyptic number.

It is an amenable number.

4321512109 is a deficient number, since it is larger than the sum of its proper divisors (1).

4321512109 is an equidigital number, since it uses as much as digits as its factorization.

4321512109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 4321512109 is about 65738.2088971094. The cubic root of 4321512109 is about 1628.8405707212.

The spelling of 4321512109 in words is "four billion, three hundred twenty-one million, five hundred twelve thousand, one hundred nine".