1012221 has 12 divisors (see below), whose sum is σ = 1671072. Its totient is φ = 578376.

The previous prime is 1012217. The next prime is 1012229. The reversal of 1012221 is 1222101.

It is not a de Polignac number, because 1012221 - 2² = 1012217 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 (1012229) 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, 7971 + ... + 8096.

It is an arithmetic number, because the mean of its divisors is an integer number (139256).

2^1012221 is an apocalyptic number.

It is an amenable number.

1012221 is a deficient number, since it is larger than the sum of its proper divisors (658851).

1012221 is a wasteful number, since it uses less digits than its factorization.

1012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16080 (or 16077 counting only the distinct ones).

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

The square root of 1012221 is about 1006.0919441085. The cubic root of 1012221 is about 100.4057183666.

Adding to 1012221 its reverse (1222101), we get a palindrome (2234322).

The spelling of 1012221 in words is "one million, twelve thousand, two hundred twenty-one".