128333404333821 has 16 divisors (see below), whose sum is σ = 172461608044544. Its totient is φ = 84880425740544.

The previous prime is 128333404333817. The next prime is 128333404333891.

128333404333821 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 128333404333821 - 2² = 128333404333817 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128333404333891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18638025 + ... + 24577281.

It is an arithmetic number, because the mean of its divisors is an integer number (10778850502784).

Almost surely, 2^{128333404333821} is an apocalyptic number.

It is an amenable number.

128333404333821 is a deficient number, since it is larger than the sum of its proper divisors (44128203710723).

128333404333821 is a wasteful number, since it uses less digits than its factorization.

128333404333821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5996100.

The product of its (nonzero) digits is 2985984, while the sum is 48.

The spelling of 128333404333821 in words is "one hundred twenty-eight trillion, three hundred thirty-three billion, four hundred four million, three hundred thirty-three thousand, eight hundred twenty-one".