212130105 has 32 divisors (see below), whose sum is σ = 379306368. Its totient is φ = 100339200.

The previous prime is 212130101. The next prime is 212130109. The reversal of 212130105 is 501031212.

212130105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (212130101) and next prime (212130109).

It is not a de Polignac number, because 212130105 - 2² = 212130101 is a prime.

It is a super-2 number, since 2×212130105² = 89998362894622050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (212130101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8914 + ... + 22443.

It is an arithmetic number, because the mean of its divisors is an integer number (11853324).

Almost surely, 2^212130105 is an apocalyptic number.

It is an amenable number.

212130105 is a deficient number, since it is larger than the sum of its proper divisors (167176263).

212130105 is a wasteful number, since it uses less digits than its factorization.

212130105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31417.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 212130105 is about 14564.6869173354. The cubic root of 212130105 is about 596.3951490127.

Adding to 212130105 its reverse (501031212), we get a palindrome (713161317).

The spelling of 212130105 in words is "two hundred twelve million, one hundred thirty thousand, one hundred five".