13211343856 has 10 divisors (see below), whose sum is σ = 25596978752. Its totient is φ = 6605671920.

The previous prime is 13211343809. The next prime is 13211343857. The reversal of 13211343856 is 65834311231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13211343857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 412854480 + ... + 412854511.

Almost surely, 2^13211343856 is an apocalyptic number.

13211343856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13211343856 is a deficient number, since it is larger than the sum of its proper divisors (12385634896).

13211343856 is an equidigital number, since it uses as much as digits as its factorization.

13211343856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825708999 (or 825708993 counting only the distinct ones).

The product of its digits is 51840, while the sum is 37.

The spelling of 13211343856 in words is "thirteen billion, two hundred eleven million, three hundred forty-three thousand, eight hundred fifty-six".