212021412 has 24 divisors (see below), whose sum is σ = 504052416. Its totient is φ = 69340128.

The previous prime is 212021401. The next prime is 212021413. The reversal of 212021412 is 214120212.

It is a junction number, because it is equal to n+sod(n) for n = 212021391 and 212021400.

It is not an unprimeable number, because it can be changed into a prime (212021413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166048 + ... + 167319.

It is an arithmetic number, because the mean of its divisors is an integer number (21002184).

Almost surely, 2^212021412 is an apocalyptic number.

It is an amenable number.

212021412 is an abundant number, since it is smaller than the sum of its proper divisors (292031004).

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

212021412 is a wasteful number, since it uses less digits than its factorization.

212021412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333427 (or 333425 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 212021412 is about 14560.9550510947. The cubic root of 212021412 is about 596.2932696295.

Adding to 212021412 its reverse (214120212), we get a palindrome (426141624).

It can be divided in two parts, 2120 and 21412, that added together give a palindrome (23532).

The spelling of 212021412 in words is "two hundred twelve million, twenty-one thousand, four hundred twelve".