211071203125 has 56 divisors (see below), whose sum is σ = 286183680552. Its totient is φ = 155040000000.

The previous prime is 211071203071. The next prime is 211071203141. The reversal of 211071203125 is 521302170112.

It can be written as a sum of positive squares in 28 ways, for example, as 101033708164 + 110037494961 = 317858^2 + 331719^2 .

It is not a de Polignac number, because 211071203125 - 2²⁵ = 211037648693 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211071203125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 10880935 + ... + 10900315.

It is an arithmetic number, because the mean of its divisors is an integer number (5110422867).

Almost surely, 2^211071203125 is an apocalyptic number.

211071203125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

211071203125 is a deficient number, since it is larger than the sum of its proper divisors (75112477427).

211071203125 is an frugal number, since it uses more digits than its factorization.

211071203125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19469 (or 19444 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 25.

Adding to 211071203125 its reverse (521302170112), we get a palindrome (732373373237).

The spelling of 211071203125 in words is "two hundred eleven billion, seventy-one million, two hundred three thousand, one hundred twenty-five".