2102210105 has 8 divisors (see below), whose sum is σ = 2524128264. Its totient is φ = 1680784000.

The previous prime is 2102210069. The next prime is 2102210111. The reversal of 2102210105 is 5010122012.

It can be written as a sum of positive squares in 4 ways, for example, as 6310144 + 2095899961 = 2512^2 + 45781^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2102210105 - 2¹⁸ = 2101947961 is a prime.

It is a super-2 number, since 2×2102210105² = 8838574651128222050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2102210105.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113546 + ... + 130755.

It is an arithmetic number, because the mean of its divisors is an integer number (315516033).

Almost surely, 2^2102210105 is an apocalyptic number.

It is an amenable number.

2102210105 is a deficient number, since it is larger than the sum of its proper divisors (421918159).

2102210105 is a wasteful number, since it uses less digits than its factorization.

2102210105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246027.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 2102210105 is about 45849.8648307713. The cubic root of 2102210105 is about 1281.0282478648.

Adding to 2102210105 its reverse (5010122012), we get a palindrome (7112332117).

The spelling of 2102210105 in words is "two billion, one hundred two million, two hundred ten thousand, one hundred five".