421421212 has 24 divisors (see below), whose sum is σ = 753411456. Its totient is φ = 206209008.

The previous prime is 421421201. The next prime is 421421213. The reversal of 421421212 is 212124124.

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

It is a self number, because there is not a number n which added to its sum of digits gives 421421212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421421213) 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, 29593 + ... + 41455.

It is an arithmetic number, because the mean of its divisors is an integer number (31392144).

Almost surely, 2^421421212 is an apocalyptic number.

It is an amenable number.

421421212 is a deficient number, since it is larger than the sum of its proper divisors (331990244).

421421212 is a wasteful number, since it uses less digits than its factorization.

421421212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12057 (or 12055 counting only the distinct ones).

The product of its digits is 256, while the sum is 19.

The square root of 421421212 is about 20528.5462709857. The cubic root of 421421212 is about 749.7309921171.

Adding to 421421212 its reverse (212124124), we get a palindrome (633545336).

The spelling of 421421212 in words is "four hundred twenty-one million, four hundred twenty-one thousand, two hundred twelve".