2221122311 has 4 divisors (see below), whose sum is σ = 2224818624. Its totient is φ = 2217426000.

The previous prime is 2221122263. The next prime is 2221122331. The reversal of 2221122311 is 1132211222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1132211222 = 2 ⋅566105611.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2221122311 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 2221122311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221122331) 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 3 ways as a sum of consecutive naturals, for example, 1847255 + ... + 1848456.

It is an arithmetic number, because the mean of its divisors is an integer number (556204656).

Almost surely, 2^2221122311 is an apocalyptic number.

2221122311 is a deficient number, since it is larger than the sum of its proper divisors (3696313).

2221122311 is an equidigital number, since it uses as much as digits as its factorization.

2221122311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3696312.

The product of its digits is 96, while the sum is 17.

The square root of 2221122311 is about 47128.7843148961. The cubic root of 2221122311 is about 1304.7405445156.

Adding to 2221122311 its reverse (1132211222), we get a palindrome (3353333533).

The spelling of 2221122311 in words is "two billion, two hundred twenty-one million, one hundred twenty-two thousand, three hundred eleven".