20021201 has 8 divisors (see below), whose sum is σ = 21337344. Its totient is φ = 18742240.

The previous prime is 20021171. The next prime is 20021203. The reversal of 20021201 is 10212002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20021201 - 2⁶ = 20021137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20021203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8180 + ... + 10341.

It is an arithmetic number, because the mean of its divisors is an integer number (2667168).

Almost surely, 2^20021201 is an apocalyptic number.

It is an amenable number.

20021201 is a deficient number, since it is larger than the sum of its proper divisors (1316143).

20021201 is a wasteful number, since it uses less digits than its factorization.

20021201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18591.

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 20021201 is about 4474.5056710211. The cubic root of 20021201 is about 271.5376417347.

Adding to 20021201 its reverse (10212002), we get a palindrome (30233203).

The spelling of 20021201 in words is "twenty million, twenty-one thousand, two hundred one".