128010129952321 has 8 divisors (see below), whose sum is σ = 133007639209920. Its totient is φ = 123051511817808.

The previous prime is 128010129952291. The next prime is 128010129952333. The reversal of 128010129952321 is 123259921010821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128010129952321 - 2⁷ = 128010129952193 is a prime.

It is a super-2 number, since 2×128010129952321² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128010129962321) 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 7 ways as a sum of consecutive naturals, for example, 9722774061 + ... + 9722787226.

It is an arithmetic number, because the mean of its divisors is an integer number (16625954901240).

Almost surely, 2^{128010129952321} is an apocalyptic number.

It is an amenable number.

128010129952321 is a deficient number, since it is larger than the sum of its proper divisors (4997509257599).

128010129952321 is a wasteful number, since it uses less digits than its factorization.

128010129952321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19445561543.

The product of its (nonzero) digits is 155520, while the sum is 46.

The spelling of 128010129952321 in words is "one hundred twenty-eight trillion, ten billion, one hundred twenty-nine million, nine hundred fifty-two thousand, three hundred twenty-one".