213223120220 has 96 divisors (see below), whose sum is σ = 497952536256. Its totient is φ = 76032819200.

The previous prime is 213223120219. The next prime is 213223120249. The reversal of 213223120220 is 22021322312.

It is a happy number.

213223120220 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 (20).

It is a junction number, because it is equal to n+sod(n) for n = 213223120192 and 213223120201.

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 31 ways as a sum of consecutive naturals, for example, 30557372 + ... + 30564348.

It is an arithmetic number, because the mean of its divisors is an integer number (5187005586).

Almost surely, 2^213223120220 is an apocalyptic number.

213223120220 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 213223120220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248976268128).

213223120220 is an abundant number, since it is smaller than the sum of its proper divisors (284729416036).

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

213223120220 is a wasteful number, since it uses less digits than its factorization.

213223120220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9671 (or 9669 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 213223120220 its reverse (22021322312), we get a palindrome (235244442532).

The spelling of 213223120220 in words is "two hundred thirteen billion, two hundred twenty-three million, one hundred twenty thousand, two hundred twenty".