2121021012133 has 4 divisors (see below), whose sum is σ = 2141613449248. Its totient is φ = 2100428575020.

The previous prime is 2121021012053. The next prime is 2121021012137. The reversal of 2121021012133 is 3312101201212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2121021012133 - 2⁹ = 2121021011621 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2121021012133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121021012137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10296218403 + ... + 10296218608.

It is an arithmetic number, because the mean of its divisors is an integer number (535403362312).

Almost surely, 2^{2121021012133} is an apocalyptic number.

It is an amenable number.

2121021012133 is a deficient number, since it is larger than the sum of its proper divisors (20592437115).

2121021012133 is a wasteful number, since it uses less digits than its factorization.

2121021012133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20592437114.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 2121021012133 its reverse (3312101201212), we get a palindrome (5433122213345).

The spelling of 2121021012133 in words is "two trillion, one hundred twenty-one billion, twenty-one million, twelve thousand, one hundred thirty-three".