3121113311 has 4 divisors (see below), whose sum is σ = 3123513624. Its totient is φ = 3118713000.

The previous prime is 3121113301. The next prime is 3121113329. The reversal of 3121113311 is 1133111213.

3121113311 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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3121113311 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 3121113311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121113301) 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, 1198205 + ... + 1200806.

It is an arithmetic number, because the mean of its divisors is an integer number (780878406).

Almost surely, 2^3121113311 is an apocalyptic number.

3121113311 is a deficient number, since it is larger than the sum of its proper divisors (2400313).

3121113311 is a wasteful number, since it uses less digits than its factorization.

3121113311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2400312.

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

The square root of 3121113311 is about 55866.9250182968. The cubic root of 3121113311 is about 1461.4024977765.

Adding to 3121113311 its reverse (1133111213), we get a palindrome (4254224524).

The spelling of 3121113311 in words is "three billion, one hundred twenty-one million, one hundred thirteen thousand, three hundred eleven".