7102221 has 16 divisors (see below), whose sum is σ = 10911744. Its totient is φ = 4024944.

The previous prime is 7102213. The next prime is 7102223. The reversal of 7102221 is 1222017.

It is not a de Polignac number, because 7102221 - 2³ = 7102213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7102221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7102223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1336 + ... + 3998.

It is an arithmetic number, because the mean of its divisors is an integer number (681984).

Almost surely, 2^7102221 is an apocalyptic number.

It is an amenable number.

7102221 is a deficient number, since it is larger than the sum of its proper divisors (3809523).

7102221 is a wasteful number, since it uses less digits than its factorization.

7102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2800.

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 7102221 is about 2664.9992495309. Note that the first 3 decimals coincide. The cubic root of 7102221 is about 192.2197732965.

Adding to 7102221 its reverse (1222017), we get a palindrome (8324238).

The spelling of 7102221 in words is "seven million, one hundred two thousand, two hundred twenty-one".