128135272218131 has 8 divisors (see below), whose sum is σ = 128480557289760. Its totient is φ = 127790068626688.

The previous prime is 128135272218067. The next prime is 128135272218143. The reversal of 128135272218131 is 131812272531821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128135272218131 - 2⁶ = 128135272218067 is a prime.

It is a super-2 number, since 2×128135272218131² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128135272218931) 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, 17219966 + ... + 23511651.

It is an arithmetic number, because the mean of its divisors is an integer number (16060069661220).

Almost surely, 2^{128135272218131} is an apocalyptic number.

128135272218131 is a deficient number, since it is larger than the sum of its proper divisors (345285071629).

128135272218131 is an equidigital number, since it uses as much as digits as its factorization.

128135272218131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40740093.

The product of its digits is 322560, while the sum is 47.

The spelling of 128135272218131 in words is "one hundred twenty-eight trillion, one hundred thirty-five billion, two hundred seventy-two million, two hundred eighteen thousand, one hundred thirty-one".