20020220221 has 16 divisors (see below), whose sum is σ = 21787315200. Its totient is φ = 18319392000.

The previous prime is 20020220203. The next prime is 20020220249. The reversal of 20020220221 is 12202202002.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20020220221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020220201) 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, 868596 + ... + 891346.

It is an arithmetic number, because the mean of its divisors is an integer number (1361707200).

Almost surely, 2^20020220221 is an apocalyptic number.

It is an amenable number.

20020220221 is a deficient number, since it is larger than the sum of its proper divisors (1767094979).

20020220221 is a wasteful number, since it uses less digits than its factorization.

20020220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24204.

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 20020220221 its reverse (12202202002), we get a palindrome (32222422223).

The spelling of 20020220221 in words is "twenty billion, twenty million, two hundred twenty thousand, two hundred twenty-one".