421201212 has 24 divisors (see below), whose sum is σ = 989315712. Its totient is φ = 139470000.

The previous prime is 421201199. The next prime is 421201213. The reversal of 421201212 is 212102124.

It is a junction number, because it is equal to n+sod(n) for n = 421201191 and 421201200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421201213) 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, 114414 + ... + 118037.

It is an arithmetic number, because the mean of its divisors is an integer number (41221488).

Almost surely, 2^421201212 is an apocalyptic number.

It is an amenable number.

421201212 is an abundant number, since it is smaller than the sum of its proper divisors (568114500).

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

421201212 is a wasteful number, since it uses less digits than its factorization.

421201212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232609 (or 232607 counting only the distinct ones).

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

The square root of 421201212 is about 20523.1871793832. The cubic root of 421201212 is about 749.6005054655.

Adding to 421201212 its reverse (212102124), we get a palindrome (633303336).

The spelling of 421201212 in words is "four hundred twenty-one million, two hundred one thousand, two hundred twelve".