213311023212 has 144 divisors (see below), whose sum is σ = 585451819008. Its totient is φ = 60268682880.

The previous prime is 213311023171. The next prime is 213311023213. The reversal of 213311023212 is 212320113312.

213311023212 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 (21).

It is not an unprimeable number, because it can be changed into a prime (213311023213) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 23667787 + ... + 23676797.

It is an arithmetic number, because the mean of its divisors is an integer number (4065637632).

Almost surely, 2^213311023212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213311023212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292725909504).

213311023212 is an abundant number, since it is smaller than the sum of its proper divisors (372140795796).

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

213311023212 is a wasteful number, since it uses less digits than its factorization.

213311023212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9476 (or 9467 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 213311023212 its reverse (212320113312), we get a palindrome (425631136524).

The spelling of 213311023212 in words is "two hundred thirteen billion, three hundred eleven million, twenty-three thousand, two hundred twelve".