213213123222 has 64 divisors (see below), whose sum is σ = 477500652288. Its totient is φ = 62921520000.

The previous prime is 213213123217. The next prime is 213213123281. The reversal of 213213123222 is 222321312312.

It is a super-2 number, since 2×213213123222² (a number of 23 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 213213123192 and 213213123201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 144453 + ... + 668799.

It is an arithmetic number, because the mean of its divisors is an integer number (7460947692).

Almost surely, 2^213213123222 is an apocalyptic number.

213213123222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 213213123222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238750326144).

213213123222 is an abundant number, since it is smaller than the sum of its proper divisors (264287529066).

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

213213123222 is a wasteful number, since it uses less digits than its factorization.

213213123222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524525.

The product of its digits is 1728, while the sum is 24.

Adding to 213213123222 its reverse (222321312312), we get a palindrome (435534435534).

The spelling of 213213123222 in words is "two hundred thirteen billion, two hundred thirteen million, one hundred twenty-three thousand, two hundred twenty-two".