212421242 has 16 divisors (see below), whose sum is σ = 350678592. Its totient is φ = 95699520.

The previous prime is 212421241. The next prime is 212421323. The reversal of 212421242 is 242124212.

212421242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 40238 + ... + 45209.

It is an arithmetic number, because the mean of its divisors is an integer number (21917412).

Almost surely, 2^212421242 is an apocalyptic number.

212421242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

212421242 is a deficient number, since it is larger than the sum of its proper divisors (138257350).

212421242 is a wasteful number, since it uses less digits than its factorization.

212421242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85573.

The product of its digits is 512, while the sum is 20.

The square root of 212421242 is about 14574.6781096531. The cubic root of 212421242 is about 596.6678642271.

Adding to 212421242 its reverse (242124212), we get a palindrome (454545454).

The spelling of 212421242 in words is "two hundred twelve million, four hundred twenty-one thousand, two hundred forty-two".