4121420420 has 24 divisors (see below), whose sum is σ = 9320751384. Its totient is φ = 1521755136.

The previous prime is 4121420419. The next prime is 4121420423. The reversal of 4121420420 is 240241214.

It can be written as a sum of positive squares in 4 ways, for example, as 239382784 + 3882037636 = 15472^2 + 62306^2 .

It is a super-2 number, since 2×4121420420² = 33972212556785952800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 4121420392 and 4121420401.

It is not an unprimeable number, because it can be changed into a prime (4121420423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7925549 + ... + 7926068.

It is an arithmetic number, because the mean of its divisors is an integer number (388364641).

Almost surely, 2^4121420420 is an apocalyptic number.

It is an amenable number.

4121420420 is an abundant number, since it is smaller than the sum of its proper divisors (5199330964).

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

4121420420 is a wasteful number, since it uses less digits than its factorization.

4121420420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15851639 (or 15851637 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 4121420420 is about 64198.2898526121. The cubic root of 4121420420 is about 1603.3031266746.

Adding to 4121420420 its reverse (240241214), we get a palindrome (4361661634).

The spelling of 4121420420 in words is "four billion, one hundred twenty-one million, four hundred twenty thousand, four hundred twenty".