211461803125 has 12 divisors (see below), whose sum is σ = 264310340868. Its totient is φ = 169169440000.

The previous prime is 211461803101. The next prime is 211461803129. The reversal of 211461803125 is 521308164112.

It can be written as a sum of positive squares in 6 ways, for example, as 141551270289 + 69910532836 = 376233^2 + 264406^2 .

It is not a de Polignac number, because 211461803125 - 2⁷ = 211461802997 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 (211461803129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33830764 + ... + 33837013.

It is an arithmetic number, because the mean of its divisors is an integer number (22025861739).

Almost surely, 2^211461803125 is an apocalyptic number.

211461803125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

211461803125 is a deficient number, since it is larger than the sum of its proper divisors (52848537743).

211461803125 is an frugal number, since it uses more digits than its factorization.

211461803125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67667802 (or 67667782 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

Adding to 211461803125 its reverse (521308164112), we get a palindrome (732769967237).

The spelling of 211461803125 in words is "two hundred eleven billion, four hundred sixty-one million, eight hundred three thousand, one hundred twenty-five".