2221122211 has 32 divisors (see below), whose sum is σ = 2932715520. Its totient is φ = 1629655200.

The previous prime is 2221122187. The next prime is 2221122229. The reversal of 2221122211 is 1122211222.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2221122211 - 2¹¹ = 2221120163 is a prime.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (2221122611) 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 31 ways as a sum of consecutive naturals, for example, 239776 + ... + 248866.

It is an arithmetic number, because the mean of its divisors is an integer number (91647360).

Almost surely, 2^2221122211 is an apocalyptic number.

2221122211 is a deficient number, since it is larger than the sum of its proper divisors (711593309).

2221122211 is a wasteful number, since it uses less digits than its factorization.

2221122211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9295.

The product of its digits is 64, while the sum is 16.

The square root of 2221122211 is about 47128.7832539734. The cubic root of 2221122211 is about 1304.7405249348.

Adding to 2221122211 its reverse (1122211222), we get a palindrome (3343333433).

It can be divided in two parts, 22211222 and 11, that multiplied together give a palindrome (244323442).

The spelling of 2221122211 in words is "two billion, two hundred twenty-one million, one hundred twenty-two thousand, two hundred eleven".