2222521111 has 4 divisors (see below), whose sum is σ = 2299159800. Its totient is φ = 2145882424.

The previous prime is 2222521109. The next prime is 2222521117. The reversal of 2222521111 is 1111252222.

It is a happy number.

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 2222521111 - 2¹ = 2222521109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2222521117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38319301 + ... + 38319358.

It is an arithmetic number, because the mean of its divisors is an integer number (574789950).

Almost surely, 2^2222521111 is an apocalyptic number.

2222521111 is a deficient number, since it is larger than the sum of its proper divisors (76638689).

2222521111 is an equidigital number, since it uses as much as digits as its factorization.

2222521111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76638688.

The product of its digits is 160, while the sum is 19.

The square root of 2222521111 is about 47143.6221667364. The cubic root of 2222521111 is about 1305.0143832670.

Adding to 2222521111 its reverse (1111252222), we get a palindrome (3333773333).

The spelling of 2222521111 in words is "two billion, two hundred twenty-two million, five hundred twenty-one thousand, one hundred eleven".