31211111343 has 16 divisors (see below), whose sum is σ = 44136032256. Its totient is φ = 19576460640.

The previous prime is 31211111279. The next prime is 31211111363. The reversal of 31211111343 is 34311111213.

It is not a de Polignac number, because 31211111343 - 2⁶ = 31211111279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31211111363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3703455 + ... + 3711872.

It is an arithmetic number, because the mean of its divisors is an integer number (2758502016).

Almost surely, 2^31211111343 is an apocalyptic number.

31211111343 is a deficient number, since it is larger than the sum of its proper divisors (12924920913).

31211111343 is a wasteful number, since it uses less digits than its factorization.

31211111343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7415414.

The product of its digits is 216, while the sum is 21.

Adding to 31211111343 its reverse (34311111213), we get a palindrome (65522222556).

The spelling of 31211111343 in words is "thirty-one billion, two hundred eleven million, one hundred eleven thousand, three hundred forty-three".