2201122120178 has 4 divisors (see below), whose sum is σ = 3301683180270. Its totient is φ = 1100561060088.

The previous prime is 2201122120177. The next prime is 2201122120187. The reversal of 2201122120178 is 8710212211022.

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

It can be written as a sum of positive squares in only one way, i.e., 1515649067689 + 685473052489 = 1231117^2 + 827933^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2201122120178.

It is not an unprimeable number, because it can be changed into a prime (2201122120177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550280530043 + ... + 550280530046.

Almost surely, 2^{2201122120178} is an apocalyptic number.

2201122120178 is a deficient number, since it is larger than the sum of its proper divisors (1100561060092).

2201122120178 is a wasteful number, since it uses less digits than its factorization.

2201122120178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100561060091.

The product of its (nonzero) digits is 1792, while the sum is 29.

The spelling of 2201122120178 in words is "two trillion, two hundred one billion, one hundred twenty-two million, one hundred twenty thousand, one hundred seventy-eight".