3112123121 has 2 divisors, whose sum is σ = 3112123122. Its totient is φ = 3112123120.

The previous prime is 3112123117. The next prime is 3112123129. The reversal of 3112123121 is 1213212113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3095809600 + 16313521 = 55640^2 + 4039^2 .

It is a cyclic number.

It is not a de Polignac number, because 3112123121 - 2² = 3112123117 is a prime.

It is a Sophie Germain prime.

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 3112123121.

It is not a weakly prime, because it can be changed into another prime (3112123129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1556061560 + 1556061561.

It is an arithmetic number, because the mean of its divisors is an integer number (1556061561).

Almost surely, 2^3112123121 is an apocalyptic number.

It is an amenable number.

3112123121 is a deficient number, since it is larger than the sum of its proper divisors (1).

3112123121 is an equidigital number, since it uses as much as digits as its factorization.

3112123121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72, while the sum is 17.

The square root of 3112123121 is about 55786.4062384377. The cubic root of 3112123121 is about 1459.9979860171.

Adding to 3112123121 its reverse (1213212113), we get a palindrome (4325335234).

The spelling of 3112123121 in words is "three billion, one hundred twelve million, one hundred twenty-three thousand, one hundred twenty-one".