10020102221 has 4 divisors (see below), whose sum is σ = 10021224444. Its totient is φ = 10018980000.

The previous prime is 10020102203. The next prime is 10020102227. The reversal of 10020102221 is 12220102001.

It is a happy number.

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 7003346596 + 3016755625 = 83686^2 + 54925^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10020102221 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 (10020102227) 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, 547610 + ... + 565611.

It is an arithmetic number, because the mean of its divisors is an integer number (2505306111).

Almost surely, 2^10020102221 is an apocalyptic number.

It is an amenable number.

10020102221 is a deficient number, since it is larger than the sum of its proper divisors (1122223).

10020102221 is an equidigital number, since it uses as much as digits as its factorization.

10020102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122222.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 10020102221 its reverse (12220102001), we get a palindrome (22240204222).

The spelling of 10020102221 in words is "ten billion, twenty million, one hundred two thousand, two hundred twenty-one".