2105210534845 has 16 divisors (see below), whose sum is σ = 2761665477120. Its totient is φ = 1527865816000.

The previous prime is 2105210534827. The next prime is 2105210534857. The reversal of 2105210534845 is 5484350125012.

It is a happy number.

It is not a de Polignac number, because 2105210534845 - 2¹⁹ = 2105210010557 is a prime.

It is a super-2 number, since 2×2105210534845² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2105210534798 and 2105210534807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39928306 + ... + 39980995.

It is an arithmetic number, because the mean of its divisors is an integer number (172604092320).

Almost surely, 2^{2105210534845} is an apocalyptic number.

It is an amenable number.

2105210534845 is a deficient number, since it is larger than the sum of its proper divisors (656454942275).

2105210534845 is a wasteful number, since it uses less digits than its factorization.

2105210534845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79909796.

The product of its (nonzero) digits is 192000, while the sum is 40.

Adding to 2105210534845 its reverse (5484350125012), we get a palindrome (7589560659857).

The spelling of 2105210534845 in words is "two trillion, one hundred five billion, two hundred ten million, five hundred thirty-four thousand, eight hundred forty-five".