7105221 has 24 divisors (see below), whose sum is σ = 11105120. Its totient is φ = 4362336.

The previous prime is 7105213. The next prime is 7105223. The reversal of 7105221 is 1225017.

It is not a de Polignac number, because 7105221 - 2³ = 7105213 is a prime.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 7105194 and 7105203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7105223) 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, 5766 + ... + 6888.

Almost surely, 2^7105221 is an apocalyptic number.

It is an amenable number.

7105221 is a deficient number, since it is larger than the sum of its proper divisors (3999899).

7105221 is a wasteful number, since it uses less digits than its factorization.

7105221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185 (or 1182 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 7105221 is about 2665.5620420467. The cubic root of 7105221 is about 192.2468342279.

The spelling of 7105221 in words is "seven million, one hundred five thousand, two hundred twenty-one".