212421244 has 24 divisors (see below), whose sum is σ = 432861408. Its totient is φ = 89319360.

The previous prime is 212421241. The next prime is 212421323. The reversal of 212421244 is 442124212.

212421244 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212421241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70087 + ... + 73054.

It is an arithmetic number, because the mean of its divisors is an integer number (18035892).

Almost surely, 2^212421244 is an apocalyptic number.

It is an amenable number.

212421244 is an abundant number, since it is smaller than the sum of its proper divisors (220440164).

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

212421244 is a wasteful number, since it uses less digits than its factorization.

212421244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143205 (or 143203 counting only the distinct ones).

The product of its digits is 1024, while the sum is 22.

The square root of 212421244 is about 14574.6781782652. The cubic root of 212421244 is about 596.6678660997.

Adding to 212421244 its reverse (442124212), we get a palindrome (654545456).

The spelling of 212421244 in words is "two hundred twelve million, four hundred twenty-one thousand, two hundred forty-four".