4211912729809 has 4 divisors (see below), whose sum is σ = 4280960479540. Its totient is φ = 4142864980080.

The previous prime is 4211912729807. The next prime is 4211912729851. The reversal of 4211912729809 is 9089272191124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 895052229184 + 3316860500625 = 946072^2 + 1821225^2 .

It is a cyclic number.

It is not a de Polignac number, because 4211912729809 - 2¹ = 4211912729807 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4211912729809.

It is not an unprimeable number, because it can be changed into a prime (4211912729807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34523874774 + ... + 34523874895.

It is an arithmetic number, because the mean of its divisors is an integer number (1070240119885).

Almost surely, 2^{4211912729809} is an apocalyptic number.

It is an amenable number.

4211912729809 is a deficient number, since it is larger than the sum of its proper divisors (69047749731).

4211912729809 is an equidigital number, since it uses as much as digits as its factorization.

4211912729809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69047749730.

The product of its (nonzero) digits is 1306368, while the sum is 55.

The spelling of 4211912729809 in words is "four trillion, two hundred eleven billion, nine hundred twelve million, seven hundred twenty-nine thousand, eight hundred nine".