10102221 has 24 divisors (see below), whose sum is σ = 15649920. Its totient is φ = 6263136.

The previous prime is 10102207. The next prime is 10102289. The reversal of 10102221 is 12220101.

10102221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10102221 - 2⁹ = 10101709 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10102201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7000 + ... + 8318.

It is an arithmetic number, because the mean of its divisors is an integer number (652080).

Almost surely, 2^10102221 is an apocalyptic number.

It is an amenable number.

10102221 is a deficient number, since it is larger than the sum of its proper divisors (5547699).

10102221 is a wasteful number, since it uses less digits than its factorization.

10102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385 (or 1382 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 10102221 is about 3178.3991253460. The cubic root of 10102221 is about 216.1750766764.

Adding to 10102221 its reverse (12220101), we get a palindrome (22322322).

The spelling of 10102221 in words is "ten million, one hundred two thousand, two hundred twenty-one".