13212113220 has 144 divisors (see below), whose sum is σ = 42878297280. Its totient is φ = 3283027200.

The previous prime is 13212113209. The next prime is 13212113251. The reversal of 13212113220 is 2231121231.

13212113220 is a `hidden beast` number, since 1 + 321 + 21 + 1 + 322 + 0 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 13212113193 and 13212113202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 176955 + ... + 240285.

Almost surely, 2^13212113220 is an apocalyptic number.

13212113220 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 13212113220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21439148640).

13212113220 is an abundant number, since it is smaller than the sum of its proper divisors (29666184060).

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

13212113220 is a wasteful number, since it uses less digits than its factorization.

13212113220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63426 (or 63421 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 13212113220 its reverse (2231121231), we get a palindrome (15443234451).

The spelling of 13212113220 in words is "thirteen billion, two hundred twelve million, one hundred thirteen thousand, two hundred twenty".