2121043021212 has 12 divisors (see below), whose sum is σ = 4949100382856. Its totient is φ = 707014340400.

The previous prime is 2121043021211. The next prime is 2121043021213. The reversal of 2121043021212 is 2121203401212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2121043021211) and next prime (2121043021213).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121043021211) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 88376792539 + ... + 88376792562.

Almost surely, 2^{2121043021212} is an apocalyptic number.

It is an amenable number.

2121043021212 is an abundant number, since it is smaller than the sum of its proper divisors (2828057361644).

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

2121043021212 is a wasteful number, since it uses less digits than its factorization.

2121043021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176753585108 (or 176753585106 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 2121043021212 its reverse (2121203401212), we get a palindrome (4242246422424).

The spelling of 2121043021212 in words is "two trillion, one hundred twenty-one billion, forty-three million, twenty-one thousand, two hundred twelve".