7221002111 has 4 divisors (see below), whose sum is σ = 7224991224. Its totient is φ = 7217013000.

The previous prime is 7221002057. The next prime is 7221002203. The reversal of 7221002111 is 1112001227.

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

It is a cyclic number.

It is not a de Polignac number, because 7221002111 - 2¹⁴ = 7220985727 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7221002111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7221002311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1991840 + ... + 1995461.

It is an arithmetic number, because the mean of its divisors is an integer number (1806247806).

Almost surely, 2^7221002111 is an apocalyptic number.

7221002111 is a deficient number, since it is larger than the sum of its proper divisors (3989113).

7221002111 is a wasteful number, since it uses less digits than its factorization.

7221002111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3989112.

The product of its (nonzero) digits is 56, while the sum is 17.

The square root of 7221002111 is about 84976.4797517525. The cubic root of 7221002111 is about 1932.8544757923.

Adding to 7221002111 its reverse (1112001227), we get a palindrome (8333003338).

The spelling of 7221002111 in words is "seven billion, two hundred twenty-one million, two thousand, one hundred eleven".