4221012120 has 128 divisors (see below), whose sum is σ = 13860987840. Its totient is φ = 1021962240.

The previous prime is 4221012079. The next prime is 4221012121. The reversal of 4221012120 is 212101224.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 4221012120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221012121) 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 31 ways as a sum of consecutive naturals, for example, 72982 + ... + 117338.

Almost surely, 2^4221012120 is an apocalyptic number.

4221012120 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4221012120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6930493920).

4221012120 is an abundant number, since it is smaller than the sum of its proper divisors (9639975720).

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

4221012120 is a wasteful number, since it uses less digits than its factorization.

4221012120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44445 (or 44441 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 4221012120 is about 64969.3167579897. The cubic root of 4221012120 is about 1616.1147712411.

Adding to 4221012120 its reverse (212101224), we get a palindrome (4433113344).

The spelling of 4221012120 in words is "four billion, two hundred twenty-one million, twelve thousand, one hundred twenty".