3111221121 has 8 divisors (see below), whose sum is σ = 4151776800. Its totient is φ = 2072406432.

The previous prime is 3111221107. The next prime is 3111221147. The reversal of 3111221121 is 1211221113.

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

It is not a de Polignac number, because 3111221121 - 2⁷ = 3111220993 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3111221121.

It is not an unprimeable number, because it can be changed into a prime (3111221161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 431071 + ... + 438228.

It is an arithmetic number, because the mean of its divisors is an integer number (518972100).

Almost surely, 2^3111221121 is an apocalyptic number.

It is an amenable number.

3111221121 is a deficient number, since it is larger than the sum of its proper divisors (1040555679).

3111221121 is a wasteful number, since it uses less digits than its factorization.

3111221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870495.

The product of its digits is 24, while the sum is 15.

The square root of 3111221121 is about 55778.3212458030. The cubic root of 3111221121 is about 1459.8569198937.

Adding to 3111221121 its reverse (1211221113), we get a palindrome (4322442234).

The spelling of 3111221121 in words is "three billion, one hundred eleven million, two hundred twenty-one thousand, one hundred twenty-one".