3111013121 has 2 divisors, whose sum is σ = 3111013122. Its totient is φ = 3111013120.

The previous prime is 3111013111. The next prime is 3111013151. The reversal of 3111013121 is 1213101113.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3029291521 + 81721600 = 55039^2 + 9040^2 .

It is a cyclic number.

It is not a de Polignac number, because 3111013121 - 2¹⁰ = 3111012097 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3111013096 and 3111013105.

It is not a weakly prime, because it can be changed into another prime (3111013111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1555506560 + 1555506561.

It is an arithmetic number, because the mean of its divisors is an integer number (1555506561).

Almost surely, 2^3111013121 is an apocalyptic number.

It is an amenable number.

3111013121 is a deficient number, since it is larger than the sum of its proper divisors (1).

3111013121 is an equidigital number, since it uses as much as digits as its factorization.

3111013121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 3111013121 is about 55776.4566909731. The cubic root of 3111013121 is about 1459.8243863648.

Adding to 3111013121 its reverse (1213101113), we get a palindrome (4324114234).

The spelling of 3111013121 in words is "three billion, one hundred eleven million, thirteen thousand, one hundred twenty-one".