2100220172170 has 16 divisors (see below), whose sum is σ = 3810163212288. Its totient is φ = 833473201680.

The previous prime is 2100220172159. The next prime is 2100220172177. The reversal of 2100220172170 is 712710220012.

It is not an unprimeable number, because it can be changed into a prime (2100220172177) 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 7 ways as a sum of consecutive naturals, for example, 826857066 + ... + 826859605.

It is an arithmetic number, because the mean of its divisors is an integer number (238135200768).

Almost surely, 2^{2100220172170} is an apocalyptic number.

2100220172170 is a deficient number, since it is larger than the sum of its proper divisors (1709943040118).

2100220172170 is a wasteful number, since it uses less digits than its factorization.

2100220172170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1653716805.

The product of its (nonzero) digits is 784, while the sum is 25.

Adding to 2100220172170 its reverse (712710220012), we get a palindrome (2812930392182).

The spelling of 2100220172170 in words is "two trillion, one hundred billion, two hundred twenty million, one hundred seventy-two thousand, one hundred seventy".