212121010002210 has 128 divisors (see below), whose sum is σ = 524210731720704. Its totient is φ = 54893655210240.

The previous prime is 212121010002151. The next prime is 212121010002229. The reversal of 212121010002210 is 12200010121212.

It is a super-3 number, since 3×212121010002210³ (a number of 44 digits) contains 333 as substring.

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 212121010002210.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 971643687 + ... + 971861973.

It is an arithmetic number, because the mean of its divisors is an integer number (4095396341568).

Almost surely, 2^{212121010002210} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212121010002210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262105365860352).

212121010002210 is an abundant number, since it is smaller than the sum of its proper divisors (312089721718494).

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

212121010002210 is a wasteful number, since it uses less digits than its factorization.

212121010002210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220608.

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

Adding to 212121010002210 its reverse (12200010121212), we get a palindrome (224321020123422).

The spelling of 212121010002210 in words is "two hundred twelve trillion, one hundred twenty-one billion, ten million, two thousand, two hundred ten".