10020222221 has 4 divisors (see below), whose sum is σ = 10119432444. Its totient is φ = 9921012000.

The previous prime is 10020222217. The next prime is 10020222253. The reversal of 10020222221 is 12222202001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9225602500 + 794619721 = 96050^2 + 28189^2 .

It is a cyclic number.

It is not a de Polignac number, because 10020222221 - 2² = 10020222217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10020222196 and 10020222205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10020222271) 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, 49604960 + ... + 49605161.

It is an arithmetic number, because the mean of its divisors is an integer number (2529858111).

Almost surely, 2^10020222221 is an apocalyptic number.

It is an amenable number.

10020222221 is a deficient number, since it is larger than the sum of its proper divisors (99210223).

10020222221 is an equidigital number, since it uses as much as digits as its factorization.

10020222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99210222.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 10020222221 its reverse (12222202001), we get a palindrome (22242424222).

The spelling of 10020222221 in words is "ten billion, twenty million, two hundred twenty-two thousand, two hundred twenty-one".