31130231211 has 24 divisors (see below), whose sum is σ = 45571936176. Its totient is φ = 20475230400.

The previous prime is 31130231203. The next prime is 31130231213. The reversal of 31130231211 is 11213203113.

31130231211 is a `hidden beast` number, since 311 + 30 + 2 + 312 + 11 = 666.

It is not a de Polignac number, because 31130231211 - 2³ = 31130231203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31130231213) 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 23 ways as a sum of consecutive naturals, for example, 196741 + ... + 317753.

It is an arithmetic number, because the mean of its divisors is an integer number (1898830674).

Almost surely, 2^31130231211 is an apocalyptic number.

31130231211 is a deficient number, since it is larger than the sum of its proper divisors (14441704965).

31130231211 is a wasteful number, since it uses less digits than its factorization.

31130231211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121403 (or 121400 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 31130231211 its reverse (11213203113), we get a palindrome (42343434324).

The spelling of 31130231211 in words is "thirty-one billion, one hundred thirty million, two hundred thirty-one thousand, two hundred eleven".