212421072 has 40 divisors (see below), whose sum is σ = 549277344. Its totient is φ = 70739584.

The previous prime is 212421071. The next prime is 212421091. The reversal of 212421072 is 270124212.

212421072 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212421071) 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, 93583 + ... + 95825.

Almost surely, 2^212421072 is an apocalyptic number.

It is an amenable number.

212421072 is an abundant number, since it is smaller than the sum of its proper divisors (336856272).

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

212421072 is a wasteful number, since it uses less digits than its factorization.

212421072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4227 (or 4221 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 212421072 is about 14574.6722776191. The cubic root of 212421072 is about 596.6677050566.

Adding to 212421072 its reverse (270124212), we get a palindrome (482545284).

The spelling of 212421072 in words is "two hundred twelve million, four hundred twenty-one thousand, seventy-two".