3112130221 has 2 divisors, whose sum is σ = 3112130222. Its totient is φ = 3112130220.

The previous prime is 3112130209. The next prime is 3112130227. The reversal of 3112130221 is 1220312113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2627690121 + 484440100 = 51261^2 + 22010^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3112130221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3112130195 and 3112130204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3112130227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1556065110 + 1556065111.

It is an arithmetic number, because the mean of its divisors is an integer number (1556065111).

Almost surely, 2^3112130221 is an apocalyptic number.

It is an amenable number.

3112130221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3112130221 is an equidigital number, since it uses as much as digits as its factorization.

3112130221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 3112130221 is about 55786.4698739757. The cubic root of 3112130221 is about 1459.9990962964. Note that the first 3 decimals are identical.

Adding to 3112130221 its reverse (1220312113), we get a palindrome (4332442334).

The spelling of 3112130221 in words is "three billion, one hundred twelve million, one hundred thirty thousand, two hundred twenty-one".