31130211111 has 8 divisors (see below), whose sum is σ = 41507964144. Its totient is φ = 20752966080.

The previous prime is 31130211089. The next prime is 31130211131. The reversal of 31130211111 is 11111203113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31130211111 - 2²⁶ = 31063102247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31130211131) 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 7 ways as a sum of consecutive naturals, for example, 52051 + ... + 254891.

It is an arithmetic number, because the mean of its divisors is an integer number (5188495518).

Almost surely, 2^31130211111 is an apocalyptic number.

31130211111 is a deficient number, since it is larger than the sum of its proper divisors (10377753033).

31130211111 is a wasteful number, since it uses less digits than its factorization.

31130211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254001.

The product of its (nonzero) digits is 18, while the sum is 15.

Adding to 31130211111 its reverse (11111203113), we get a palindrome (42241414224).

The spelling of 31130211111 in words is "thirty-one billion, one hundred thirty million, two hundred eleven thousand, one hundred eleven".