2105021300 has 36 divisors (see below), whose sum is σ = 4612267296. Its totient is φ = 833829600.

The previous prime is 2105021287. The next prime is 2105021309. The reversal of 2105021300 is 31205012.

It is a happy number.

It is a super-2 number, since 2×2105021300² = 8862229346907380000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105021309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91886 + ... + 112485.

It is an arithmetic number, because the mean of its divisors is an integer number (128118536).

Almost surely, 2^2105021300 is an apocalyptic number.

2105021300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2105021300 is an abundant number, since it is smaller than the sum of its proper divisors (2507245996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2105021300 is a wasteful number, since it uses less digits than its factorization.

2105021300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204488 (or 204481 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 2105021300 is about 45880.5111131077. The cubic root of 2105021300 is about 1281.5990148140.

Adding to 2105021300 its reverse (31205012), we get a palindrome (2136226312).

The spelling of 2105021300 in words is "two billion, one hundred five million, twenty-one thousand, three hundred".