7121222 has 4 divisors (see below), whose sum is σ = 10681836. Its totient is φ = 3560610.

The previous prime is 7121209. The next prime is 7121263. The reversal of 7121222 is 2221217.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 7121222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1780304 + ... + 1780307.

It is an arithmetic number, because the mean of its divisors is an integer number (2670459).

Almost surely, 2^7121222 is an apocalyptic number.

7121222 is a deficient number, since it is larger than the sum of its proper divisors (3560614).

7121222 is a wasteful number, since it uses less digits than its factorization.

7121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3560613.

The product of its digits is 112, while the sum is 17.

The square root of 7121222 is about 2668.5617849321. The cubic root of 7121222 is about 192.3910397033.

Adding to 7121222 its reverse (2221217), we get a palindrome (9342439).

The spelling of 7121222 in words is "seven million, one hundred twenty-one thousand, two hundred twenty-two".