213012032220 has 144 divisors (see below), whose sum is σ = 712811316672. Its totient is φ = 51154836480.

The previous prime is 213012032203. The next prime is 213012032227. The reversal of 213012032220 is 22230210312.

213012032220 is a `hidden beast` number, since 2 + 1 + 301 + 20 + 322 + 20 = 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 = 213012032193 and 213012032202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213012032227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1014192 + ... + 1206071.

It is an arithmetic number, because the mean of its divisors is an integer number (4950078588).

Almost surely, 2^213012032220 is an apocalyptic number.

213012032220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213012032220 is an abundant number, since it is smaller than the sum of its proper divisors (499799284452).

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

213012032220 is a wasteful number, since it uses less digits than its factorization.

213012032220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2220332 (or 2220327 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 213012032220 its reverse (22230210312), we get a palindrome (235242242532).

The spelling of 213012032220 in words is "two hundred thirteen billion, twelve million, thirty-two thousand, two hundred twenty".