212121132 has 24 divisors (see below), whose sum is σ = 495188400. Its totient is φ = 70672896.

The previous prime is 212121113. The next prime is 212121139. The reversal of 212121132 is 231121212.

It is a super-2 number, since 2×212121132² = 89990749281922848, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (212121139) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 39844 + ... + 44852.

It is an arithmetic number, because the mean of its divisors is an integer number (20632850).

Almost surely, 2^212121132 is an apocalyptic number.

It is an amenable number.

212121132 is an abundant number, since it is smaller than the sum of its proper divisors (283067268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212121132 is a wasteful number, since it uses less digits than its factorization.

212121132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8545 (or 8543 counting only the distinct ones).

The product of its digits is 48, while the sum is 15.

The square root of 212121132 is about 14564.3788745006. The cubic root of 212121132 is about 596.3867398195.

Adding to 212121132 its reverse (231121212), we get a palindrome (443242344).

It can be divided in two parts, 212121 and 132, that multiplied together give a palindrome (27999972).

The spelling of 212121132 in words is "two hundred twelve million, one hundred twenty-one thousand, one hundred thirty-two".