10221022221 has 4 divisors (see below), whose sum is σ = 13628029632. Its totient is φ = 6814014812.

The previous prime is 10221022193. The next prime is 10221022237. The reversal of 10221022221 is 12222012201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10221022221 - 2⁶ = 10221022157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10221022221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10221020221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1703503701 + ... + 1703503706.

It is an arithmetic number, because the mean of its divisors is an integer number (3407007408).

Almost surely, 2^10221022221 is an apocalyptic number.

It is an amenable number.

10221022221 is a deficient number, since it is larger than the sum of its proper divisors (3407007411).

10221022221 is an equidigital number, since it uses as much as digits as its factorization.

10221022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3407007410.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 10221022221 its reverse (12222012201), we get a palindrome (22443034422).

The spelling of 10221022221 in words is "ten billion, two hundred twenty-one million, twenty-two thousand, two hundred twenty-one".