13211203220 has 48 divisors (see below), whose sum is σ = 29062672128. Its totient is φ = 5035008000.

The previous prime is 13211203211. The next prime is 13211203249. The reversal of 13211203220 is 2230211231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62345 + ... + 174095.

It is an arithmetic number, because the mean of its divisors is an integer number (605472336).

Almost surely, 2^13211203220 is an apocalyptic number.

13211203220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13211203220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14531336064).

13211203220 is an abundant number, since it is smaller than the sum of its proper divisors (15851468908).

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

13211203220 is a wasteful number, since it uses less digits than its factorization.

13211203220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112040 (or 112038 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 13211203220 its reverse (2230211231), we get a palindrome (15441414451).

The spelling of 13211203220 in words is "thirteen billion, two hundred eleven million, two hundred three thousand, two hundred twenty".