136628999121 has 4 divisors (see below), whose sum is σ = 182171998832. Its totient is φ = 91085999412.

The previous prime is 136628999119. The next prime is 136628999137. The reversal of 136628999121 is 121999826631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121999826631 = 3 ⋅40666608877.

It is not a de Polignac number, because 136628999121 - 2¹ = 136628999119 is a prime.

It is a super-4 number, since 4×136628999121⁴ (a number of 46 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136628999621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22771499851 + ... + 22771499856.

It is an arithmetic number, because the mean of its divisors is an integer number (45542999708).

Almost surely, 2^136628999121 is an apocalyptic number.

It is an amenable number.

136628999121 is a deficient number, since it is larger than the sum of its proper divisors (45542999711).

136628999121 is an equidigital number, since it uses as much as digits as its factorization.

136628999121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45542999710.

The product of its digits is 2519424, while the sum is 57.

The spelling of 136628999121 in words is "one hundred thirty-six billion, six hundred twenty-eight million, nine hundred ninety-nine thousand, one hundred twenty-one".