2128226150185 has 4 divisors (see below), whose sum is σ = 2553871380228. Its totient is φ = 1702580920144.

The previous prime is 2128226150161. The next prime is 2128226150189. The reversal of 2128226150185 is 5810516228212.

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

It can be written as a sum of positive squares in 2 ways, for example, as 451418703129 + 1676807447056 = 671877^2 + 1294916^2 .

It is a cyclic number.

It is not a de Polignac number, because 2128226150185 - 2²⁷ = 2128091932457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2128226150189) 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, 212822615014 + ... + 212822615023.

It is an arithmetic number, because the mean of its divisors is an integer number (638467845057).

Almost surely, 2^{2128226150185} is an apocalyptic number.

It is an amenable number.

2128226150185 is a deficient number, since it is larger than the sum of its proper divisors (425645230043).

2128226150185 is an equidigital number, since it uses as much as digits as its factorization.

2128226150185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425645230042.

The product of its (nonzero) digits is 153600, while the sum is 43.

The spelling of 2128226150185 in words is "two trillion, one hundred twenty-eight billion, two hundred twenty-six million, one hundred fifty thousand, one hundred eighty-five".