4202012321 has 4 divisors (see below), whose sum is σ = 4525244052. Its totient is φ = 3878780592.

The previous prime is 4202012293. The next prime is 4202012357. The reversal of 4202012321 is 1232102024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1635070096 + 2566942225 = 40436^2 + 50665^2 .

It is a cyclic number.

It is not a de Polignac number, because 4202012321 - 2⁶ = 4202012257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4202012321.

It is not an unprimeable number, because it can be changed into a prime (4202012821) 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 3 ways as a sum of consecutive naturals, for example, 161615846 + ... + 161615871.

It is an arithmetic number, because the mean of its divisors is an integer number (1131311013).

Almost surely, 2^4202012321 is an apocalyptic number.

It is an amenable number.

4202012321 is a deficient number, since it is larger than the sum of its proper divisors (323231731).

4202012321 is a wasteful number, since it uses less digits than its factorization.

4202012321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323231730.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 4202012321 is about 64822.9305184516. The cubic root of 4202012321 is about 1613.6862823701.

Adding to 4202012321 its reverse (1232102024), we get a palindrome (5434114345).

The spelling of 4202012321 in words is "four billion, two hundred two million, twelve thousand, three hundred twenty-one".