10212005 has 4 divisors (see below), whose sum is σ = 12254412. Its totient is φ = 8169600.

The previous prime is 10211983. The next prime is 10212011. The reversal of 10212005 is 50021201.

10212005 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1079521 + 9132484 = 1039^2 + 3022^2 .

It is not a de Polignac number, because 10212005 - 2¹² = 10207909 is a prime.

It is a super-2 number, since 2×10212005² = 208570092240050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1021196 + ... + 1021205.

It is an arithmetic number, because the mean of its divisors is an integer number (3063603).

Almost surely, 2^10212005 is an apocalyptic number.

It is an amenable number.

10212005 is a deficient number, since it is larger than the sum of its proper divisors (2042407).

10212005 is an equidigital number, since it uses as much as digits as its factorization.

10212005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2042406.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 10212005 is about 3195.6227875017. The cubic root of 10212005 is about 216.9553377755.

Adding to 10212005 its reverse (50021201), we get a palindrome (60233206).

The spelling of 10212005 in words is "ten million, two hundred twelve thousand, five".