10021220221 has 8 divisors (see below), whose sum is σ = 10481197824. Its totient is φ = 9563265360.

The previous prime is 10021220207. The next prime is 10021220227. The reversal of 10021220221 is 12202212001.

It is a happy number.

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 10021220221 - 2⁵ = 10021220189 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 (10021220227) 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, 495546 + ... + 515371.

It is an arithmetic number, because the mean of its divisors is an integer number (1310149728).

Almost surely, 2^10021220221 is an apocalyptic number.

It is an amenable number.

10021220221 is a deficient number, since it is larger than the sum of its proper divisors (459977603).

10021220221 is a wasteful number, since it uses less digits than its factorization.

10021220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011371.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 10021220221 its reverse (12202212001), we get a palindrome (22223432222).

The spelling of 10021220221 in words is "ten billion, twenty-one million, two hundred twenty thousand, two hundred twenty-one".