4120212421 has 16 divisors (see below), whose sum is σ = 4532235120. Its totient is φ = 3722135040.

The previous prime is 4120212419. The next prime is 4120212521. The reversal of 4120212421 is 1242120214.

It can be written as a sum of positive squares in 8 ways, for example, as 203205025 + 3917007396 = 14255^2 + 62586^2 .

It is not a de Polignac number, because 4120212421 - 2¹ = 4120212419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4120212521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 274491 + ... + 289111.

It is an arithmetic number, because the mean of its divisors is an integer number (283264695).

Almost surely, 2^4120212421 is an apocalyptic number.

It is an amenable number.

4120212421 is a deficient number, since it is larger than the sum of its proper divisors (412022699).

4120212421 is a wasteful number, since it uses less digits than its factorization.

4120212421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15096.

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

The square root of 4120212421 is about 64188.8808205907. The cubic root of 4120212421 is about 1603.1464672681.

Adding to 4120212421 its reverse (1242120214), we get a palindrome (5362332635).

The spelling of 4120212421 in words is "four billion, one hundred twenty million, two hundred twelve thousand, four hundred twenty-one".