2220221121 has 8 divisors (see below), whose sum is σ = 3062374080. Its totient is φ = 1429107792.

The previous prime is 2220221099. The next prime is 2220221123. The reversal of 2220221121 is 1211220222.

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

It is not a de Polignac number, because 2220221121 - 2⁵ = 2220221089 is a prime.

It is a super-2 number, since 2×2220221121² = 9858763652268993282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2220221121.

It is not an unprimeable number, because it can be changed into a prime (2220221123) 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 7 ways as a sum of consecutive naturals, for example, 12759805 + ... + 12759978.

It is an arithmetic number, because the mean of its divisors is an integer number (382796760).

Almost surely, 2^2220221121 is an apocalyptic number.

It is an amenable number.

2220221121 is a deficient number, since it is larger than the sum of its proper divisors (842152959).

2220221121 is a wasteful number, since it uses less digits than its factorization.

2220221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25519815.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 2220221121 is about 47119.2224150611. Note that the first 3 decimals coincide. The cubic root of 2220221121 is about 1304.5640604343.

Adding to 2220221121 its reverse (1211220222), we get a palindrome (3431441343).

The spelling of 2220221121 in words is "two billion, two hundred twenty million, two hundred twenty-one thousand, one hundred twenty-one".