3112321221 has 12 divisors (see below), whose sum is σ = 4497048972. Its totient is φ = 2074200576.

The previous prime is 3112321217. The next prime is 3112321231. The reversal of 3112321221 is 1221232113.

3112321221 is a `hidden beast` number, since 311 + 232 + 122 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3083580900 + 28740321 = 55530^2 + 5361^2 .

It is not a de Polignac number, because 3112321221 - 2² = 3112321217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3112321194 and 3112321203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3112321231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26886 + ... + 83351.

It is an arithmetic number, because the mean of its divisors is an integer number (374754081).

Almost surely, 2^3112321221 is an apocalyptic number.

It is an amenable number.

3112321221 is a deficient number, since it is larger than the sum of its proper divisors (1384727751).

3112321221 is a wasteful number, since it uses less digits than its factorization.

3112321221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113380 (or 113377 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 3112321221 is about 55788.1817323347. The cubic root of 3112321221 is about 1460.0289637402.

Adding to 3112321221 its reverse (1221232113), we get a palindrome (4333553334).

The spelling of 3112321221 in words is "three billion, one hundred twelve million, three hundred twenty-one thousand, two hundred twenty-one".