4200320021 has 4 divisors (see below), whose sum is σ = 4201415712. Its totient is φ = 4199224332.

The previous prime is 4200319997. The next prime is 4200320077. The reversal of 4200320021 is 1200230024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4200320021 - 2¹⁴ = 4200303637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4200319978 and 4200320005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4200320221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 542075 + ... + 549768.

It is an arithmetic number, because the mean of its divisors is an integer number (1050353928).

Almost surely, 2^4200320021 is an apocalyptic number.

It is an amenable number.

4200320021 is a deficient number, since it is larger than the sum of its proper divisors (1095691).

4200320021 is a wasteful number, since it uses less digits than its factorization.

4200320021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095690.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 4200320021 is about 64809.8759526663. The cubic root of 4200320021 is about 1613.4696236385.

Adding to 4200320021 its reverse (1200230024), we get a palindrome (5400550045).

The spelling of 4200320021 in words is "four billion, two hundred million, three hundred twenty thousand, twenty-one".