128220111221604 has 96 divisors (see below), whose sum is σ = 304147678074240. Its totient is φ = 42033910514688.

The previous prime is 128220111221603. The next prime is 128220111221639. The reversal of 128220111221604 is 406122111022821.

It is not an unprimeable number, because it can be changed into a prime (128220111221603) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 497923707 + ... + 498181149.

It is an arithmetic number, because the mean of its divisors is an integer number (3168204979940).

Almost surely, 2^{128220111221604} is an apocalyptic number.

It is an amenable number.

128220111221604 is an abundant number, since it is smaller than the sum of its proper divisors (175927566852636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128220111221604 is a wasteful number, since it uses less digits than its factorization.

128220111221604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259149 (or 259147 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 33.

The spelling of 128220111221604 in words is "one hundred twenty-eight trillion, two hundred twenty billion, one hundred eleven million, two hundred twenty-one thousand, six hundred four".