213221303220 has 192 divisors, whose sum is σ = 615456092160. Its totient is φ = 55138778112.

The previous prime is 213221303213. The next prime is 213221303233. The reversal of 213221303220 is 22303122312.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 58850329 + ... + 58853951.

It is an arithmetic number, because the mean of its divisors is an integer number (3205500480).

Almost surely, 2^213221303220 is an apocalyptic number.

213221303220 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 213221303220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (307728046080).

213221303220 is an abundant number, since it is smaller than the sum of its proper divisors (402234788940).

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

213221303220 is a wasteful number, since it uses less digits than its factorization.

213221303220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3934 (or 3932 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 213221303220 its reverse (22303122312), we get a palindrome (235524425532).

The spelling of 213221303220 in words is "two hundred thirteen billion, two hundred twenty-one million, three hundred three thousand, two hundred twenty".