2121336321012 has 36 divisors (see below), whose sum is σ = 5463441661860. Its totient is φ = 693770368512.

The previous prime is 2121336320989. The next prime is 2121336321031. The reversal of 2121336321012 is 2101236331212.

2121336321012 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 3 + 3 + 632 + 10 + 12 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1357677057636 + 763659263376 = 1165194^2 + 873876^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×2121336321012² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 555903837 + ... + 555907652.

It is an arithmetic number, because the mean of its divisors is an integer number (151762268385).

Almost surely, 2^{2121336321012} is an apocalyptic number.

It is an amenable number.

2121336321012 is an abundant number, since it is smaller than the sum of its proper divisors (3342105340848).

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

2121336321012 is a wasteful number, since it uses less digits than its factorization.

2121336321012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111811552 (or 1111811547 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The spelling of 2121336321012 in words is "two trillion, one hundred twenty-one billion, three hundred thirty-six million, three hundred twenty-one thousand, twelve".