128354501131 has 4 divisors (see below), whose sum is σ = 128887092664. Its totient is φ = 127821909600.

The previous prime is 128354501129. The next prime is 128354501147. The reversal of 128354501131 is 131105453821.

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

It is a cyclic number.

It is not a de Polignac number, because 128354501131 - 2¹ = 128354501129 is a prime.

It is a super-2 number, since 2×128354501131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128354502131) 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, 266295405 + ... + 266295886.

It is an arithmetic number, because the mean of its divisors is an integer number (32221773166).

Almost surely, 2^128354501131 is an apocalyptic number.

128354501131 is a deficient number, since it is larger than the sum of its proper divisors (532591533).

128354501131 is an equidigital number, since it uses as much as digits as its factorization.

128354501131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532591532.

The product of its (nonzero) digits is 14400, while the sum is 34.

Adding to 128354501131 its reverse (131105453821), we get a palindrome (259459954952).

The spelling of 128354501131 in words is "one hundred twenty-eight billion, three hundred fifty-four million, five hundred one thousand, one hundred thirty-one".