128252622023221 has 8 divisors (see below), whose sum is σ = 128424302496000. Its totient is φ = 128080943958000.

The previous prime is 128252622023209. The next prime is 128252622023243. The reversal of 128252622023221 is 122320226252821.

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 128252622023221 - 2⁹ = 128252622022709 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 (128252622023021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122966880 + ... + 124005478.

It is an arithmetic number, because the mean of its divisors is an integer number (16053037812000).

Almost surely, 2^{128252622023221} is an apocalyptic number.

It is an amenable number.

128252622023221 is a deficient number, since it is larger than the sum of its proper divisors (171680472779).

128252622023221 is a wasteful number, since it uses less digits than its factorization.

128252622023221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203779.

The product of its (nonzero) digits is 184320, while the sum is 40.

The spelling of 128252622023221 in words is "one hundred twenty-eight trillion, two hundred fifty-two billion, six hundred twenty-two million, twenty-three thousand, two hundred twenty-one".