878100122 has 4 divisors (see below), whose sum is σ = 1317150186. Its totient is φ = 439050060.

The previous prime is 878100109. The next prime is 878100149. The reversal of 878100122 is 221001878.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 221001878 = 2 ⋅110500939.

It can be written as a sum of positive squares in only one way, i.e., 517062121 + 361038001 = 22739^2 + 19001^2 .

It is an unprimeable number.

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, 219525029 + ... + 219525032.

Almost surely, 2^878100122 is an apocalyptic number.

878100122 is a deficient number, since it is larger than the sum of its proper divisors (439050064).

878100122 is a wasteful number, since it uses less digits than its factorization.

878100122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439050063.

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

The square root of 878100122 is about 29632.7542088143. The cubic root of 878100122 is about 957.5938447378.

The spelling of 878100122 in words is "eight hundred seventy-eight million, one hundred thousand, one hundred twenty-two".