3122112221 has 4 divisors (see below), whose sum is σ = 3144573600. Its totient is φ = 3099650844.

The previous prime is 3122112211. The next prime is 3122112229. The reversal of 3122112221 is 1222112213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3122112221 is a prime.

It is a Duffinian number.

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 3122112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3122112229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11230481 + ... + 11230758.

It is an arithmetic number, because the mean of its divisors is an integer number (786143400).

Almost surely, 2^3122112221 is an apocalyptic number.

It is an amenable number.

3122112221 is a deficient number, since it is larger than the sum of its proper divisors (22461379).

3122112221 is a wasteful number, since it uses less digits than its factorization.

3122112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22461378.

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

The square root of 3122112221 is about 55875.8643870500. The cubic root of 3122112221 is about 1461.5583880753.

Adding to 3122112221 its reverse (1222112213), we get a palindrome (4344224434).

It can be divided in two parts, 312211 and 2221, that added together give a cube (314432 = 68³).

The spelling of 3122112221 in words is "three billion, one hundred twenty-two million, one hundred twelve thousand, two hundred twenty-one".