213211220012 has 72 divisors (see below), whose sum is σ = 459113237856. Its totient is φ = 86205917952.

The previous prime is 213211220011. The next prime is 213211220017. The reversal of 213211220012 is 210022112312.

It is not an unprimeable number, because it can be changed into a prime (213211220011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5138 + ... + 653030.

It is an arithmetic number, because the mean of its divisors is an integer number (6376572748).

Almost surely, 2^213211220012 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 213211220012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229556618928).

213211220012 is an abundant number, since it is smaller than the sum of its proper divisors (245902017844).

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

213211220012 is a wasteful number, since it uses less digits than its factorization.

213211220012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648007 (or 647998 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 213211220012 its reverse (210022112312), we get a palindrome (423233332324).

The spelling of 213211220012 in words is "two hundred thirteen billion, two hundred eleven million, two hundred twenty thousand, twelve".