4222012521 has 16 divisors (see below), whose sum is σ = 5650272320. Its totient is φ = 2804232960.

The previous prime is 4222012519. The next prime is 4222012547. The reversal of 4222012521 is 1252102224.

It is not a de Polignac number, because 4222012521 - 2¹ = 4222012519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4222012621) 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, 1265826 + ... + 1269156.

It is an arithmetic number, because the mean of its divisors is an integer number (353142020).

Almost surely, 2^4222012521 is an apocalyptic number.

It is an amenable number.

4222012521 is a deficient number, since it is larger than the sum of its proper divisors (1428259799).

4222012521 is a wasteful number, since it uses less digits than its factorization.

4222012521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4776.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 4222012521 is about 64977.0153284990. The cubic root of 4222012521 is about 1616.2424369191.

Adding to 4222012521 its reverse (1252102224), we get a palindrome (5474114745).

The spelling of 4222012521 in words is "four billion, two hundred twenty-two million, twelve thousand, five hundred twenty-one".