20021210201 has 8 divisors (see below), whose sum is σ = 20215403208. Its totient is φ = 19827936000.

The previous prime is 20021210189. The next prime is 20021210207. The reversal of 20021210201 is 10201212002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1654455625 + 18366754576 = 40675^2 + 135524^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20021210201 - 2²⁶ = 19954101337 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20021210207) 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, 185870 + ... + 273111.

It is an arithmetic number, because the mean of its divisors is an integer number (2526925401).

Almost surely, 2^20021210201 is an apocalyptic number.

It is an amenable number.

20021210201 is a deficient number, since it is larger than the sum of its proper divisors (194193007).

20021210201 is a wasteful number, since it uses less digits than its factorization.

20021210201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459403.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20021210201 its reverse (10201212002), we get a palindrome (30222422203).

The spelling of 20021210201 in words is "twenty billion, twenty-one million, two hundred ten thousand, two hundred one".