13131211212 has 96 divisors (see below), whose sum is σ = 39376243200. Its totient is φ = 3706554816.

The previous prime is 13131211207. The next prime is 13131211241. The reversal of 13131211212 is 21211213131.

13131211212 is a `hidden beast` number, since 131 + 312 + 11 + 212 = 666.

13131211212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41887 + ... + 167382.

It is an arithmetic number, because the mean of its divisors is an integer number (410169200).

Almost surely, 2^13131211212 is an apocalyptic number.

13131211212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13131211212 is an abundant number, since it is smaller than the sum of its proper divisors (26245031988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13131211212 is a wasteful number, since it uses less digits than its factorization.

13131211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209372 (or 209364 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 13131211212 its reverse (21211213131), we get a palindrome (34342424343).

The spelling of 13131211212 in words is "thirteen billion, one hundred thirty-one million, two hundred eleven thousand, two hundred twelve".