105212132 has 12 divisors (see below), whose sum is σ = 188039040. Its totient is φ = 51486696.

The previous prime is 105212123. The next prime is 105212147. The reversal of 105212132 is 231212501.

It is a happy number.

It is a super-2 number, since 2×105212132² = 22139185439970848, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 105212132.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279632 + ... + 280007.

It is an arithmetic number, because the mean of its divisors is an integer number (15669920).

Almost surely, 2^105212132 is an apocalyptic number.

It is an amenable number.

105212132 is a deficient number, since it is larger than the sum of its proper divisors (82826908).

105212132 is a wasteful number, since it uses less digits than its factorization.

105212132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559690 (or 559688 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 105212132 is about 10257.2965249134. The cubic root of 105212132 is about 472.0868903043.

Adding to 105212132 its reverse (231212501), we get a palindrome (336424633).

The spelling of 105212132 in words is "one hundred five million, two hundred twelve thousand, one hundred thirty-two".