2222213121 has 6 divisors (see below), whose sum is σ = 3209863410. Its totient is φ = 1481475408.

The previous prime is 2222213117. The next prime is 2222213173. The reversal of 2222213121 is 1213122222.

It can be written as a sum of positive squares in only one way, i.e., 1203326721 + 1018886400 = 34689^2 + 31920^2 .

It is not a de Polignac number, because 2222213121 - 2² = 2222213117 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2222213094 and 2222213103.

It is not an unprimeable number, because it can be changed into a prime (2222214121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 123456276 + ... + 123456293.

It is an arithmetic number, because the mean of its divisors is an integer number (534977235).

Almost surely, 2^2222213121 is an apocalyptic number.

It is an amenable number.

2222213121 is a deficient number, since it is larger than the sum of its proper divisors (987650289).

2222213121 is a wasteful number, since it uses less digits than its factorization.

2222213121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246912575 (or 246912572 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 2222213121 is about 47140.3555459651. The cubic root of 2222213121 is about 1304.9540988832.

Adding to 2222213121 its reverse (1213122222), we get a palindrome (3435335343).

The spelling of 2222213121 in words is "two billion, two hundred twenty-two million, two hundred thirteen thousand, one hundred twenty-one".