4201020021 has 16 divisors (see below), whose sum is σ = 6111696960. Its totient is φ = 2545605120.

The previous prime is 4201019981. The next prime is 4201020029. The reversal of 4201020021 is 1200201024.

It is not a de Polignac number, because 4201020021 - 2⁹ = 4201019509 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4201019979 and 4201020006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4201020029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 277381 + ... + 292133.

It is an arithmetic number, because the mean of its divisors is an integer number (381981060).

Almost surely, 2^4201020021 is an apocalyptic number.

It is an amenable number.

4201020021 is a deficient number, since it is larger than the sum of its proper divisors (1910676939).

4201020021 is a wasteful number, since it uses less digits than its factorization.

4201020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23396.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 4201020021 is about 64815.2761391942. The cubic root of 4201020021 is about 1613.5592490317.

Adding to 4201020021 its reverse (1200201024), we get a palindrome (5401221045).

The spelling of 4201020021 in words is "four billion, two hundred one million, twenty thousand, twenty-one".