212100566503 has 16 divisors (see below), whose sum is σ = 255395552256. Its totient is φ = 172207791360.

The previous prime is 212100566479. The next prime is 212100566519. The reversal of 212100566503 is 305665001212.

It is a cyclic number.

It is not a de Polignac number, because 212100566503 - 2³³ = 203510631911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212100563503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6378538 + ... + 6411703.

It is an arithmetic number, because the mean of its divisors is an integer number (15962222016).

Almost surely, 2^212100566503 is an apocalyptic number.

212100566503 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

212100566503 is a deficient number, since it is larger than the sum of its proper divisors (43294985753).

212100566503 is a wasteful number, since it uses less digits than its factorization.

212100566503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12790374.

The product of its (nonzero) digits is 10800, while the sum is 31.

Adding to 212100566503 its reverse (305665001212), we get a palindrome (517765567715).

The spelling of 212100566503 in words is "two hundred twelve billion, one hundred million, five hundred sixty-six thousand, five hundred three".