128200420101 has 16 divisors (see below), whose sum is σ = 184330452096. Its totient is φ = 78786367296.

The previous prime is 128200420081. The next prime is 128200420133. The reversal of 128200420101 is 101024002821.

It is not a de Polignac number, because 128200420101 - 2⁶ = 128200420037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128200420171) 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, 2183130 + ... + 2241083.

It is an arithmetic number, because the mean of its divisors is an integer number (11520653256).

Almost surely, 2^128200420101 is an apocalyptic number.

It is an amenable number.

128200420101 is a deficient number, since it is larger than the sum of its proper divisors (56130031995).

128200420101 is a wasteful number, since it uses less digits than its factorization.

128200420101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4424972.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 128200420101 its reverse (101024002821), we get a palindrome (229224422922).

The spelling of 128200420101 in words is "one hundred twenty-eight billion, two hundred million, four hundred twenty thousand, one hundred one".