43305621708121 has 4 divisors (see below), whose sum is σ = 43307606678452. Its totient is φ = 43303636737792.

The previous prime is 43305621708109. The next prime is 43305621708133. The reversal of 43305621708121 is 12180712650334.

It is a happy number.

43305621708121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (43305621708109) and next prime (43305621708133).

It can be written as a sum of positive squares in 2 ways, for example, as 24105546867600 + 19200074840521 = 4909740^2 + 4381789^2 .

It is a cyclic number.

It is not a de Polignac number, because 43305621708121 - 2³⁵ = 43271261969753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43305621708821) 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, 992452440 + ... + 992496073.

It is an arithmetic number, because the mean of its divisors is an integer number (10826901669613).

Almost surely, 2^{43305621708121} is an apocalyptic number.

It is an amenable number.

43305621708121 is a deficient number, since it is larger than the sum of its proper divisors (1984970331).

43305621708121 is a wasteful number, since it uses less digits than its factorization.

43305621708121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1984970330.

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 43305621708121 in words is "forty-three trillion, three hundred five billion, six hundred twenty-one million, seven hundred eight thousand, one hundred twenty-one".