2221111121 has 8 divisors (see below), whose sum is σ = 2315649600. Its totient is φ = 2128522032.

The previous prime is 2221111103. The next prime is 2221111129. The reversal of 2221111121 is 1211111222.

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

It is a cyclic number.

It is not a de Polignac number, because 2221111121 - 2¹⁸ = 2220848977 is a prime.

It is a super-2 number, since 2×2221111121² = 9866669223659753282, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2221111096 and 2221111105.

It is not an unprimeable number, because it can be changed into a prime (2221111129) 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, 485021 + ... + 489578.

It is an arithmetic number, because the mean of its divisors is an integer number (289456200).

Almost surely, 2^2221111121 is an apocalyptic number.

It is an amenable number.

2221111121 is a deficient number, since it is larger than the sum of its proper divisors (94538479).

2221111121 is an equidigital number, since it uses as much as digits as its factorization.

2221111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974695.

The product of its digits is 16, while the sum is 14.

The square root of 2221111121 is about 47128.6655974896. The cubic root of 2221111121 is about 1304.7383534204.

Adding to 2221111121 its reverse (1211111222), we get a palindrome (3432222343).

The spelling of 2221111121 in words is "two billion, two hundred twenty-one million, one hundred eleven thousand, one hundred twenty-one".