3112122221 has 24 divisors (see below), whose sum is σ = 3568233984. Its totient is φ = 2697696000.

The previous prime is 3112122193. The next prime is 3112122241. The reversal of 3112122221 is 1222212113.

It is not a de Polignac number, because 3112122221 - 2³⁰ = 2038380397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3112122221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3112122241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2820956 + ... + 2822058.

It is an arithmetic number, because the mean of its divisors is an integer number (148676416).

Almost surely, 2^3112122221 is an apocalyptic number.

It is an amenable number.

3112122221 is a deficient number, since it is larger than the sum of its proper divisors (456111763).

3112122221 is a wasteful number, since it uses less digits than its factorization.

3112122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1901 (or 1884 counting only the distinct ones).

The product of its digits is 96, while the sum is 17.

The square root of 3112122221 is about 55786.3981719559. The cubic root of 3112122221 is about 1459.9978452774.

Adding to 3112122221 its reverse (1222212113), we get a palindrome (4334334334).

The spelling of 3112122221 in words is "three billion, one hundred twelve million, one hundred twenty-two thousand, two hundred twenty-one".