128601500120 has 32 divisors (see below), whose sum is σ = 290006583120. Its totient is φ = 51324474240.

The previous prime is 128601500107. The next prime is 128601500141. The reversal of 128601500120 is 21005106821.

It is a super-2 number, since 2×128601500120² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128601500120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3610991 + ... + 3646430.

Almost surely, 2^128601500120 is an apocalyptic number.

128601500120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128601500120 is an abundant number, since it is smaller than the sum of its proper divisors (161405083000).

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

128601500120 is a wasteful number, since it uses less digits than its factorization.

128601500120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7257875 (or 7257871 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 26.

Adding to 128601500120 its reverse (21005106821), we get a palindrome (149606606941).

The spelling of 128601500120 in words is "one hundred twenty-eight billion, six hundred one million, five hundred thousand, one hundred twenty".