421212412 has 24 divisors (see below), whose sum is σ = 758809296. Its totient is φ = 204492288.

The previous prime is 421212401. The next prime is 421212419. The reversal of 421212412 is 214212124.

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 421212412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421212419) 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, 10323 + ... + 30805.

It is an arithmetic number, because the mean of its divisors is an integer number (31617054).

Almost surely, 2^421212412 is an apocalyptic number.

It is an amenable number.

421212412 is a deficient number, since it is larger than the sum of its proper divisors (337596884).

421212412 is a wasteful number, since it uses less digits than its factorization.

421212412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20637 (or 20635 counting only the distinct ones).

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

The square root of 421212412 is about 20523.4600396717. The cubic root of 421212412 is about 749.6071495199.

Adding to 421212412 its reverse (214212124), we get a palindrome (635424536).

The spelling of 421212412 in words is "four hundred twenty-one million, two hundred twelve thousand, four hundred twelve".