2121303313212 has 96 divisors (see below), whose sum is σ = 5288971464000. Its totient is φ = 659420332032.

The previous prime is 2121303313189. The next prime is 2121303313271. The reversal of 2121303313212 is 2123133031212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12346648 + ... + 12517280.

It is an arithmetic number, because the mean of its divisors is an integer number (55093452750).

Almost surely, 2^{2121303313212} 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 2121303313212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2644485732000).

2121303313212 is an abundant number, since it is smaller than the sum of its proper divisors (3167668150788).

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

2121303313212 is a wasteful number, since it uses less digits than its factorization.

2121303313212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171215 (or 171213 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 2121303313212 its reverse (2123133031212), we get a palindrome (4244436344424).

The spelling of 2121303313212 in words is "two trillion, one hundred twenty-one billion, three hundred three million, three hundred thirteen thousand, two hundred twelve".