13031231211 has 16 divisors (see below), whose sum is σ = 19669785120. Its totient is φ = 8523571680.

The previous prime is 13031231203. The next prime is 13031231219. The reversal of 13031231211 is 11213213031.

13031231211 is a `hidden beast` number, since 1 + 30 + 312 + 312 + 11 = 666.

It is an interprime number because it is at equal distance from previous prime (13031231203) and next prime (13031231219).

It is not a de Polignac number, because 13031231211 - 2³ = 13031231203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13031231219) 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, 4551760 + ... + 4554621.

It is an arithmetic number, because the mean of its divisors is an integer number (1229361570).

Almost surely, 2^13031231211 is an apocalyptic number.

13031231211 is a deficient number, since it is larger than the sum of its proper divisors (6638553909).

13031231211 is an equidigital number, since it uses as much as digits as its factorization.

13031231211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9106443 (or 9106437 counting only the distinct ones).

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

Adding to 13031231211 its reverse (11213213031), we get a palindrome (24244444242).

The spelling of 13031231211 in words is "thirteen billion, thirty-one million, two hundred thirty-one thousand, two hundred eleven".