2121236433912 has 64 divisors (see below), whose sum is σ = 5490843408000. Its totient is φ = 682088609664.

The previous prime is 2121236433881. The next prime is 2121236433913. The reversal of 2121236433912 is 2193346321212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121236433913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 575362 + ... + 2138577.

It is an arithmetic number, because the mean of its divisors is an integer number (85794428250).

Almost surely, 2^{2121236433912} is an apocalyptic number.

It is an amenable number.

2121236433912 is an abundant number, since it is smaller than the sum of its proper divisors (3369606974088).

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

2121236433912 is a wasteful number, since it uses less digits than its factorization.

2121236433912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2715100 (or 2715096 counting only the distinct ones).

The product of its digits is 93312, while the sum is 39.

The spelling of 2121236433912 in words is "two trillion, one hundred twenty-one billion, two hundred thirty-six million, four hundred thirty-three thousand, nine hundred twelve".