2021105525 has 24 divisors (see below), whose sum is σ = 2675275200. Its totient is φ = 1510185600.

The previous prime is 2021105509. The next prime is 2021105557. The reversal of 2021105525 is 5255011202.

It is not a de Polignac number, because 2021105525 - 2⁴ = 2021105509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2021105525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3761 + ... + 63689.

It is an arithmetic number, because the mean of its divisors is an integer number (111469800).

Almost surely, 2^2021105525 is an apocalyptic number.

2021105525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2021105525 is a deficient number, since it is larger than the sum of its proper divisors (654169675).

2021105525 is a wasteful number, since it uses less digits than its factorization.

2021105525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60029 (or 60024 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 2021105525 is about 44956.7072304011. The cubic root of 2021105525 is about 1264.3374336542.

Adding to 2021105525 its reverse (5255011202), we get a palindrome (7276116727).

The spelling of 2021105525 in words is "two billion, twenty-one million, one hundred five thousand, five hundred twenty-five".