212122011210 has 64 divisors (see below), whose sum is σ = 523706712192. Its totient is φ = 54947102976.

The previous prime is 212122011203. The next prime is 212122011259. The reversal of 212122011210 is 12110221212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 212122011210.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 524557 + ... + 836303.

It is an arithmetic number, because the mean of its divisors is an integer number (8182917378).

Almost surely, 2^212122011210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212122011210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261853356096).

212122011210 is an abundant number, since it is smaller than the sum of its proper divisors (311584700982).

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

212122011210 is a wasteful number, since it uses less digits than its factorization.

212122011210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312407.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 212122011210 its reverse (12110221212), we get a palindrome (224232232422).

The spelling of 212122011210 in words is "two hundred twelve billion, one hundred twenty-two million, eleven thousand, two hundred ten".