31121111411 has 16 divisors (see below), whose sum is σ = 34392943200. Its totient is φ = 27978531840.

The previous prime is 31121111381. The next prime is 31121111419. The reversal of 31121111411 is 11411112113.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31121111411 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 31121111411.

It is not an unprimeable number, because it can be changed into a prime (31121111419) 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, 115331 + ... + 274851.

It is an arithmetic number, because the mean of its divisors is an integer number (2149558950).

Almost surely, 2^31121111411 is an apocalyptic number.

31121111411 is a deficient number, since it is larger than the sum of its proper divisors (3271831789).

31121111411 is a wasteful number, since it uses less digits than its factorization.

31121111411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159926.

The product of its digits is 24, while the sum is 17.

Adding to 31121111411 its reverse (11411112113), we get a palindrome (42532223524).

The spelling of 31121111411 in words is "thirty-one billion, one hundred twenty-one million, one hundred eleven thousand, four hundred eleven".