4147021021 has 24 divisors (see below), whose sum is σ = 5197728312. Its totient is φ = 3275289600.

The previous prime is 4147021009. The next prime is 4147021027. The reversal of 4147021021 is 1201207414.

It can be written as a sum of positive squares in 4 ways, for example, as 40005625 + 4107015396 = 6325^2 + 64086^2 .

It is not a de Polignac number, because 4147021021 - 2⁵ = 4147020989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4147020983 and 4147021001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4147021027) 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 23 ways as a sum of consecutive naturals, for example, 50800 + ... + 104281.

It is an arithmetic number, because the mean of its divisors is an integer number (216572013).

Almost surely, 2^4147021021 is an apocalyptic number.

It is an amenable number.

4147021021 is a deficient number, since it is larger than the sum of its proper divisors (1050707291).

4147021021 is a wasteful number, since it uses less digits than its factorization.

4147021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155133 (or 155122 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 4147021021 is about 64397.3681216865. The cubic root of 4147021021 is about 1606.6159675113.

Adding to 4147021021 its reverse (1201207414), we get a palindrome (5348228435).

The spelling of 4147021021 in words is "four billion, one hundred forty-seven million, twenty-one thousand, twenty-one".