3121113211 has 16 divisors (see below), whose sum is σ = 3208828608. Its totient is φ = 3034864000.

The previous prime is 3121113209. The next prime is 3121113217. The reversal of 3121113211 is 1123111213.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 3121113211 - 2¹ = 3121113209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3121113217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2272521 + ... + 2273893.

It is an arithmetic number, because the mean of its divisors is an integer number (200551788).

Almost surely, 2^3121113211 is an apocalyptic number.

3121113211 is a deficient number, since it is larger than the sum of its proper divisors (87715397).

3121113211 is a wasteful number, since it uses less digits than its factorization.

3121113211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1862.

The product of its digits is 36, while the sum is 16.

The square root of 3121113211 is about 55866.9241233129. The cubic root of 3121113211 is about 1461.4024821688.

Adding to 3121113211 its reverse (1123111213), we get a palindrome (4244224424).

The spelling of 3121113211 in words is "three billion, one hundred twenty-one million, one hundred thirteen thousand, two hundred eleven".