3121145111 has 6 divisors (see below), whose sum is σ = 3630719880. Its totient is φ = 2675267196.

The previous prime is 3121145099. The next prime is 3121145117. The reversal of 3121145111 is 1115411213.

It is not a de Polignac number, because 3121145111 - 2⁶ = 3121145047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121145117) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31848371 + ... + 31848468.

It is an arithmetic number, because the mean of its divisors is an integer number (605119980).

Almost surely, 2^3121145111 is an apocalyptic number.

3121145111 is a deficient number, since it is larger than the sum of its proper divisors (509574769).

3121145111 is an equidigital number, since it uses as much as digits as its factorization.

3121145111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63696853 (or 63696846 counting only the distinct ones).

The product of its digits is 120, while the sum is 20.

The square root of 3121145111 is about 55867.2096224610. The cubic root of 3121145111 is about 1461.4074610099.

Adding to 3121145111 its reverse (1115411213), we get a palindrome (4236556324).

The spelling of 3121145111 in words is "three billion, one hundred twenty-one million, one hundred forty-five thousand, one hundred eleven".