2221221111 has 8 divisors (see below), whose sum is σ = 3041672304. Its totient is φ = 1440792000.

The previous prime is 2221221103. The next prime is 2221221127. The reversal of 2221221111 is 1111221222.

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

It is not a de Polignac number, because 2221221111 - 2³ = 2221221103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221221131) 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, 10005390 + ... + 10005611.

It is an arithmetic number, because the mean of its divisors is an integer number (380209038).

Almost surely, 2^2221221111 is an apocalyptic number.

2221221111 is a deficient number, since it is larger than the sum of its proper divisors (820451193).

2221221111 is a wasteful number, since it uses less digits than its factorization.

2221221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20011041.

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

The square root of 2221221111 is about 47129.8324949283. The cubic root of 2221221111 is about 1304.7598900590.

Adding to 2221221111 its reverse (1111221222), we get a palindrome (3332442333).

The spelling of 2221221111 in words is "two billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred eleven".