443121111232409 has 2 divisors, whose sum is σ = 443121111232410. Its totient is φ = 443121111232408.

The previous prime is 443121111232391. The next prime is 443121111232453. The reversal of 443121111232409 is 904232111121344.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 245580335026009 + 197540776206400 = 15671003^2 + 14054920^2 .

It is a cyclic number.

It is not a de Polignac number, because 443121111232409 - 2²⁰ = 443121110183833 is a prime.

It is not a weakly prime, because it can be changed into another prime (443121111262409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221560555616204 + 221560555616205.

It is an arithmetic number, because the mean of its divisors is an integer number (221560555616205).

Almost surely, 2^{443121111232409} is an apocalyptic number.

It is an amenable number.

443121111232409 is a deficient number, since it is larger than the sum of its proper divisors (1).

443121111232409 is an equidigital number, since it uses as much as digits as its factorization.

443121111232409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 38.

The spelling of 443121111232409 in words is "four hundred forty-three trillion, one hundred twenty-one billion, one hundred eleven million, two hundred thirty-two thousand, four hundred nine".