128601010031 has 4 divisors (see below), whose sum is σ = 138493395432. Its totient is φ = 118708624632.

The previous prime is 128601010007. The next prime is 128601010079. The reversal of 128601010031 is 130010106821.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-128601010031 is a prime.

It is a super-2 number, since 2×128601010031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128601009979 and 128601010006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128601010091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4946192681 + ... + 4946192706.

It is an arithmetic number, because the mean of its divisors is an integer number (34623348858).

Almost surely, 2^128601010031 is an apocalyptic number.

128601010031 is a deficient number, since it is larger than the sum of its proper divisors (9892385401).

128601010031 is an equidigital number, since it uses as much as digits as its factorization.

128601010031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9892385400.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 128601010031 its reverse (130010106821), we get a palindrome (258611116852).

The spelling of 128601010031 in words is "one hundred twenty-eight billion, six hundred one million, ten thousand, thirty-one".