10120221 has 12 divisors (see below), whose sum is σ = 15159872. Its totient is φ = 6746652.

The previous prime is 10120213. The next prime is 10120237. The reversal of 10120221 is 12202101.

10120221 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 10120221 - 2³ = 10120213 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10120241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20581 + ... + 21066.

Almost surely, 2^10120221 is an apocalyptic number.

It is an amenable number.

10120221 is a deficient number, since it is larger than the sum of its proper divisors (5039651).

10120221 is an frugal number, since it uses more digits than its factorization.

10120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41662 (or 41650 counting only the distinct ones).

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

The square root of 10120221 is about 3181.2294793051. The cubic root of 10120221 is about 216.3033930997.

Adding to 10120221 its reverse (12202101), we get a palindrome (22322322).

The spelling of 10120221 in words is "ten million, one hundred twenty thousand, two hundred twenty-one".