210321022212 has 144 divisors (see below), whose sum is σ = 643681164672. Its totient is φ = 56526474240.

The previous prime is 210321022151. The next prime is 210321022213. The reversal of 210321022212 is 212220123012.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (210321022213) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8602918 + ... + 8627330.

It is an arithmetic number, because the mean of its divisors is an integer number (4470008088).

Almost surely, 2^210321022212 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 210321022212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (321840582336).

210321022212 is an abundant number, since it is smaller than the sum of its proper divisors (433360142460).

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

210321022212 is a wasteful number, since it uses less digits than its factorization.

210321022212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26458 (or 26453 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 210321022212 its reverse (212220123012), we get a palindrome (422541145224).

The spelling of 210321022212 in words is "two hundred ten billion, three hundred twenty-one million, twenty-two thousand, two hundred twelve".