2102020105 has 16 divisors (see below), whose sum is σ = 2544696000. Its totient is φ = 1666799680.

The previous prime is 2102020073. The next prime is 2102020147. The reversal of 2102020105 is 5010202012.

It is not a de Polignac number, because 2102020105 - 2⁵ = 2102020073 is a prime.

It is a super-2 number, since 2×2102020105² = 8836977043648422050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 823371 + ... + 825919.

It is an arithmetic number, because the mean of its divisors is an integer number (159043500).

Almost surely, 2^2102020105 is an apocalyptic number.

It is an amenable number.

2102020105 is a deficient number, since it is larger than the sum of its proper divisors (442675895).

2102020105 is a wasteful number, since it uses less digits than its factorization.

2102020105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3944.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 2102020105 is about 45847.7928040162. The cubic root of 2102020105 is about 1280.9896531339.

Adding to 2102020105 its reverse (5010202012), we get a palindrome (7112222117).

The spelling of 2102020105 in words is "two billion, one hundred two million, twenty thousand, one hundred five".