212121200310 has 64 divisors (see below), whose sum is σ = 521132451840. Its totient is φ = 55228723200.

The previous prime is 212121200303. The next prime is 212121200383. The reversal of 212121200310 is 13002121212.

212121200310 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×212121200310² (a number of 23 digits) contains 22 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 212121200310.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 3438235 + ... + 3499385.

It is an arithmetic number, because the mean of its divisors is an integer number (8142694560).

Almost surely, 2^212121200310 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212121200310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260566225920).

212121200310 is an abundant number, since it is smaller than the sum of its proper divisors (309011251530).

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

212121200310 is a wasteful number, since it uses less digits than its factorization.

212121200310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63893.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 212121200310 its reverse (13002121212), we get a palindrome (225123321522).

The spelling of 212121200310 in words is "two hundred twelve billion, one hundred twenty-one million, two hundred thousand, three hundred ten".