208102017124 has 81 divisors (see below), whose sum is σ = 390825376851. Its totient is φ = 96947798640.

The previous prime is 208102017089. The next prime is 208102017161. The reversal of 208102017124 is 421710201802.

The square root of 208102017124 is 456182.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 208102017092 and 208102017101.

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 in 26 ways as a sum of consecutive naturals, for example, 986265379 + ... + 986265589.

Almost surely, 2^208102017124 is an apocalyptic number.

208102017124 is the 456182-nd square number.

It is an amenable number.

208102017124 is a deficient number, since it is larger than the sum of its proper divisors (182723359727).

208102017124 is an equidigital number, since it uses as much as digits as its factorization.

208102017124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566 (or 283 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 28.

Adding to 208102017124 its reverse (421710201802), we get a palindrome (629812218926).

The spelling of 208102017124 in words is "two hundred eight billion, one hundred two million, seventeen thousand, one hundred twenty-four".