2121643733 has 8 divisors (see below), whose sum is σ = 2320475040. Its totient is φ = 1923804880.

The previous prime is 2121643723. The next prime is 2121643753. The reversal of 2121643733 is 3373461212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2121643733 - 2¹⁴ = 2121627349 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 2121643733.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121643703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243635 + ... + 252192.

It is an arithmetic number, because the mean of its divisors is an integer number (290059380).

Almost surely, 2^2121643733 is an apocalyptic number.

It is an amenable number.

2121643733 is a deficient number, since it is larger than the sum of its proper divisors (198831307).

2121643733 is a wasteful number, since it uses less digits than its factorization.

2121643733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496227.

The product of its digits is 18144, while the sum is 32.

The square root of 2121643733 is about 46061.3040740273. The cubic root of 2121643733 is about 1284.9635831756.

The spelling of 2121643733 in words is "two billion, one hundred twenty-one million, six hundred forty-three thousand, seven hundred thirty-three".