20020221001 has 16 divisors (see below), whose sum is σ = 22232678400. Its totient is φ = 17875587600.

The previous prime is 20020220999. The next prime is 20020221029. The reversal of 20020221001 is 10012202002.

It is a cyclic number.

It is not a de Polignac number, because 20020221001 - 2¹ = 20020220999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20020221061) 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, 105670 + ... + 226288.

It is an arithmetic number, because the mean of its divisors is an integer number (1389542400).

Almost surely, 2^20020221001 is an apocalyptic number.

It is an amenable number.

20020221001 is a deficient number, since it is larger than the sum of its proper divisors (2212457399).

20020221001 is a wasteful number, since it uses less digits than its factorization.

20020221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120900.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20020221001 its reverse (10012202002), we get a palindrome (30032423003).

The spelling of 20020221001 in words is "twenty billion, twenty million, two hundred twenty-one thousand, one".