213222321020 has 12 divisors (see below), whose sum is σ = 447766874184. Its totient is φ = 85288928400.

The previous prime is 213222321019. The next prime is 213222321071. The reversal of 213222321020 is 20123222312.

It is a happy number.

213222321020 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), and also a Moran number because the ratio is a prime number: 10661116051 = 213222321020 / (2 + 1 + 3 + 2 + 2 + 2 + 3 + 2 + 1 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 213222320983 and 213222321001.

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 3 ways as a sum of consecutive naturals, for example, 5330558006 + ... + 5330558045.

It is an arithmetic number, because the mean of its divisors is an integer number (37313906182).

Almost surely, 2^213222321020 is an apocalyptic number.

213222321020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213222321020 is an abundant number, since it is smaller than the sum of its proper divisors (234544553164).

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

213222321020 is a wasteful number, since it uses less digits than its factorization.

213222321020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10661116060 (or 10661116058 counting only the distinct ones).

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

Adding to 213222321020 its reverse (20123222312), we get a palindrome (233345543332).

The spelling of 213222321020 in words is "two hundred thirteen billion, two hundred twenty-two million, three hundred twenty-one thousand, twenty".