2105340121525 has 48 divisors (see below), whose sum is σ = 2780003318400. Its totient is φ = 1578860156160.

The previous prime is 2105340121481. The next prime is 2105340121543. The reversal of 2105340121525 is 5251210435012.

It is not a de Polignac number, because 2105340121525 - 2¹³ = 2105340113333 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5004031 + ... + 5408419.

It is an arithmetic number, because the mean of its divisors is an integer number (57916735800).

Almost surely, 2^{2105340121525} is an apocalyptic number.

2105340121525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2105340121525 is a deficient number, since it is larger than the sum of its proper divisors (674663196875).

2105340121525 is a wasteful number, since it uses less digits than its factorization.

2105340121525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404638 (or 404633 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 2105340121525 its reverse (5251210435012), we get a palindrome (7356550556537).

The spelling of 2105340121525 in words is "two trillion, one hundred five billion, three hundred forty million, one hundred twenty-one thousand, five hundred twenty-five".