212110105 has 24 divisors (see below), whose sum is σ = 271989720. Its totient is φ = 158760960.

The previous prime is 212110079. The next prime is 212110109. The reversal of 212110105 is 501011212.

It can be written as a sum of positive squares in 12 ways, for example, as 21752896 + 190357209 = 4664^2 + 13797^2 .

It is not a de Polignac number, because 212110105 - 2⁹ = 212109593 is a prime.

It is a super-2 number, since 2×212110105² = 89981393286222050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212110109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 330585 + ... + 331225.

It is an arithmetic number, because the mean of its divisors is an integer number (11332905).

Almost surely, 2^212110105 is an apocalyptic number.

It is an amenable number.

212110105 is a deficient number, since it is larger than the sum of its proper divisors (59879615).

212110105 is a wasteful number, since it uses less digits than its factorization.

212110105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909 (or 892 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 212110105 is about 14564.0003089810. Note that the first 3 decimals coincide. The cubic root of 212110105 is about 596.3764053619.

Adding to 212110105 its reverse (501011212), we get a palindrome (713121317).

The spelling of 212110105 in words is "two hundred twelve million, one hundred ten thousand, one hundred five".