213100112220 has 72 divisors (see below), whose sum is σ = 629737459344. Its totient is φ = 53835812352.

The previous prime is 213100112207. The next prime is 213100112237. The reversal of 213100112220 is 22211001312.

213100112220 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 (15).

It is a self number, because there is not a number n which added to its sum of digits gives 213100112220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4897549 + ... + 4940868.

It is an arithmetic number, because the mean of its divisors is an integer number (8746353602).

Almost surely, 2^213100112220 is an apocalyptic number.

213100112220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213100112220 is an abundant number, since it is smaller than the sum of its proper divisors (416637347124).

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

213100112220 is a wasteful number, since it uses less digits than its factorization.

213100112220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9838467 (or 9838446 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 213100112220 its reverse (22211001312), we get a palindrome (235311113532).

The spelling of 213100112220 in words is "two hundred thirteen billion, one hundred million, one hundred twelve thousand, two hundred twenty".