4200212421 has 16 divisors (see below), whose sum is σ = 6223547520. Its totient is φ = 2799686880.

The previous prime is 4200212399. The next prime is 4200212449. The reversal of 4200212421 is 1242120024.

4200212421 is a `hidden beast` number, since 420 + 0 + 2 + 1 + 242 + 1 = 666.

It is not a de Polignac number, because 4200212421 - 2³¹ = 2052728773 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4200212394 and 4200212403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4200212221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279721 + ... + 294353.

It is an arithmetic number, because the mean of its divisors is an integer number (388971720).

Almost surely, 2^4200212421 is an apocalyptic number.

It is an amenable number.

4200212421 is a deficient number, since it is larger than the sum of its proper divisors (2023335099).

4200212421 is a wasteful number, since it uses less digits than its factorization.

4200212421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25273 (or 25267 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 4200212421 is about 64809.0458269523. The cubic root of 4200212421 is about 1613.4558460522.

Adding to 4200212421 its reverse (1242120024), we get a palindrome (5442332445).

The spelling of 4200212421 in words is "four billion, two hundred million, two hundred twelve thousand, four hundred twenty-one".