2105213125 has 20 divisors (see below), whose sum is σ = 2637280800. Its totient is φ = 1679942000.

The previous prime is 2105213111. The next prime is 2105213141. The reversal of 2105213125 is 5213125012.

It is not a de Polignac number, because 2105213125 - 2²³ = 2096824517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2105213096 and 2105213105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 257856 + ... + 265894.

It is an arithmetic number, because the mean of its divisors is an integer number (131864040).

Almost surely, 2^2105213125 is an apocalyptic number.

2105213125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2105213125 is a deficient number, since it is larger than the sum of its proper divisors (532067675).

2105213125 is an frugal number, since it uses more digits than its factorization.

2105213125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8478 (or 8463 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 2105213125 is about 45882.6015500429. The cubic root of 2105213125 is about 1281.6379432030.

Adding to 2105213125 its reverse (5213125012), we get a palindrome (7318338137).

The spelling of 2105213125 in words is "two billion, one hundred five million, two hundred thirteen thousand, one hundred twenty-five".