128220111221602 has 16 divisors (see below), whose sum is σ = 192898281261600. Its totient is φ = 63920830881600.

The previous prime is 128220111221563. The next prime is 128220111221603. The reversal of 128220111221602 is 206122111022821.

It is a happy number.

128220111221602 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 34937952 + ... + 38433067.

It is an arithmetic number, because the mean of its divisors is an integer number (12056142578850).

Almost surely, 2^{128220111221602} is an apocalyptic number.

128220111221602 is a deficient number, since it is larger than the sum of its proper divisors (64678170039998).

128220111221602 is a wasteful number, since it uses less digits than its factorization.

128220111221602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73373601.

The product of its (nonzero) digits is 3072, while the sum is 31.

The spelling of 128220111221602 in words is "one hundred twenty-eight trillion, two hundred twenty billion, one hundred eleven million, two hundred twenty-one thousand, six hundred two".