2211112221 has 8 divisors (see below), whose sum is σ = 3049810080. Its totient is φ = 1423244592.

The previous prime is 2211112219. The next prime is 2211112229. The reversal of 2211112221 is 1222111122.

2211112221 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2211112221 - 2¹ = 2211112219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2211112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211112229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12707455 + ... + 12707628.

It is an arithmetic number, because the mean of its divisors is an integer number (381226260).

Almost surely, 2^2211112221 is an apocalyptic number.

It is an amenable number.

2211112221 is a deficient number, since it is larger than the sum of its proper divisors (838697859).

2211112221 is a wasteful number, since it uses less digits than its factorization.

2211112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25415115.

The product of its digits is 32, while the sum is 15.

The square root of 2211112221 is about 47022.4650672421. The cubic root of 2211112221 is about 1302.7775369226. Note that the first 3 decimals are identical.

Adding to 2211112221 its reverse (1222111122), we get a palindrome (3433223343).

The spelling of 2211112221 in words is "two billion, two hundred eleven million, one hundred twelve thousand, two hundred twenty-one".