31311313111 has 4 divisors (see below), whose sum is σ = 33719875672. Its totient is φ = 28902750552.

The previous prime is 31311313087. The next prime is 31311313127. The reversal of 31311313111 is 11131311313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11131311313 = 911 ⋅12218783.

It is not a de Polignac number, because 31311313111 - 2⁷ = 31311312983 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 (31311313141) 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 3 ways as a sum of consecutive naturals, for example, 1204281261 + ... + 1204281286.

It is an arithmetic number, because the mean of its divisors is an integer number (8429968918).

Almost surely, 2^31311313111 is an apocalyptic number.

31311313111 is a deficient number, since it is larger than the sum of its proper divisors (2408562561).

31311313111 is a wasteful number, since it uses less digits than its factorization.

31311313111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2408562560.

The product of its digits is 81, while the sum is 19.

Adding to 31311313111 its reverse (11131311313), we get a palindrome (42442624424).

It can be divided in two parts, 31311313 and 111, that multiplied together give a palindrome (3475555743).

The spelling of 31311313111 in words is "thirty-one billion, three hundred eleven million, three hundred thirteen thousand, one hundred eleven".