3111133121 has 4 divisors (see below), whose sum is σ = 3111876144. Its totient is φ = 3110390100.

The previous prime is 3111133099. The next prime is 3111133147. The reversal of 3111133121 is 1213311113.

3111133121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1213311113 = 7 ⋅173330159.

It is a cyclic number.

It is not a de Polignac number, because 3111133121 - 2⁶ = 3111133057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3111133121.

It is not an unprimeable number, because it can be changed into a prime (3111133171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 365195 + ... + 373616.

It is an arithmetic number, because the mean of its divisors is an integer number (777969036).

Almost surely, 2^3111133121 is an apocalyptic number.

It is an amenable number.

3111133121 is a deficient number, since it is larger than the sum of its proper divisors (743023).

3111133121 is an equidigital number, since it uses as much as digits as its factorization.

3111133121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743022.

The product of its digits is 54, while the sum is 17.

The square root of 3111133121 is about 55777.5324032894. The cubic root of 3111133121 is about 1459.8431558853.

Adding to 3111133121 its reverse (1213311113), we get a palindrome (4324444234).

The spelling of 3111133121 in words is "three billion, one hundred eleven million, one hundred thirty-three thousand, one hundred twenty-one".