2121630361212 has 96 divisors (see below), whose sum is σ = 5137651411200. Its totient is φ = 680629734400.

The previous prime is 2121630361189. The next prime is 2121630361217.

2121630361212 is nontrivially palindromic in base 10.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 2121630361212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121630361217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 198444787 + ... + 198455477.

It is an arithmetic number, because the mean of its divisors is an integer number (53517202200).

Almost surely, 2^{2121630361212} 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 2121630361212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2568825705600).

2121630361212 is an abundant number, since it is smaller than the sum of its proper divisors (3016021049988).

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

2121630361212 is a wasteful number, since it uses less digits than its factorization.

2121630361212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12507 (or 12505 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

It can be divided in two parts, 2121630 and 361212, that added together give a palindrome (2482842).

The spelling of 2121630361212 in words is "two trillion, one hundred twenty-one billion, six hundred thirty million, three hundred sixty-one thousand, two hundred twelve".