3112121221 has 8 divisors (see below), whose sum is σ = 3409869600. Its totient is φ = 2816844240.

The previous prime is 3112121213. The next prime is 3112121231. The reversal of 3112121221 is 1221212113.

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

It is a cyclic number.

It is not a de Polignac number, because 3112121221 - 2³ = 3112121213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3112121195 and 3112121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3112121231) 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 7 ways as a sum of consecutive naturals, for example, 615211 + ... + 620248.

It is an arithmetic number, because the mean of its divisors is an integer number (426233700).

Almost surely, 2^3112121221 is an apocalyptic number.

It is an amenable number.

3112121221 is a deficient number, since it is larger than the sum of its proper divisors (297748379).

3112121221 is a wasteful number, since it uses less digits than its factorization.

3112121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235699.

The product of its digits is 48, while the sum is 16.

The square root of 3112121221 is about 55786.3892091969. The cubic root of 3112121221 is about 1459.9976888998.

Adding to 3112121221 its reverse (1221212113), we get a palindrome (4333333334).

The spelling of 3112121221 in words is "three billion, one hundred twelve million, one hundred twenty-one thousand, two hundred twenty-one".