213232112220 has 96 divisors (see below), whose sum is σ = 613335981888. Its totient is φ = 55311593472.

The previous prime is 213232112209. The next prime is 213232112243. The reversal of 213232112220 is 22211232312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11750274 + ... + 11768406.

It is an arithmetic number, because the mean of its divisors is an integer number (6388916478).

Almost surely, 2^213232112220 is an apocalyptic number.

213232112220 is a gapful number since it is divisible by the number (20) 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 213232112220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306667990944).

213232112220 is an abundant number, since it is smaller than the sum of its proper divisors (400103869668).

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

213232112220 is a wasteful number, since it uses less digits than its factorization.

213232112220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23479 (or 23477 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 213232112220 its reverse (22211232312), we get a palindrome (235443344532).

The spelling of 213232112220 in words is "two hundred thirteen billion, two hundred thirty-two million, one hundred twelve thousand, two hundred twenty".