2121310105 has 16 divisors (see below), whose sum is σ = 2576946960. Its totient is φ = 1676173312.

The previous prime is 2121310091. The next prime is 2121310153. The reversal of 2121310105 is 5010131212.

It can be written as a sum of positive squares in 8 ways, for example, as 49603849 + 2071706256 = 7043^2 + 45516^2 .

It is not a de Polignac number, because 2121310105 - 2¹³ = 2121301913 is a prime.

It is a super-2 number, since 2×2121310105² = 8999913123150222050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 539607 + ... + 543523.

It is an arithmetic number, because the mean of its divisors is an integer number (161059185).

Almost surely, 2^2121310105 is an apocalyptic number.

It is an amenable number.

2121310105 is a deficient number, since it is larger than the sum of its proper divisors (455636855).

2121310105 is a wasteful number, since it uses less digits than its factorization.

2121310105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5228.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 2121310105 is about 46057.6823667887. The cubic root of 2121310105 is about 1284.8962262334.

Adding to 2121310105 its reverse (5010131212), we get a palindrome (7131441317).

The spelling of 2121310105 in words is "two billion, one hundred twenty-one million, three hundred ten thousand, one hundred five".