2121666592321 has 8 divisors (see below), whose sum is σ = 2179150401600. Its totient is φ = 2064190228848.

The previous prime is 2121666592313. The next prime is 2121666592361. The reversal of 2121666592321 is 1232956661212.

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

It is not a de Polignac number, because 2121666592321 - 2³ = 2121666592313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121666592361) 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, 1281421 + ... + 2425978.

It is an arithmetic number, because the mean of its divisors is an integer number (272393800200).

Almost surely, 2^{2121666592321} is an apocalyptic number.

It is an amenable number.

2121666592321 is a deficient number, since it is larger than the sum of its proper divisors (57483809279).

2121666592321 is a wasteful number, since it uses less digits than its factorization.

2121666592321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3722903.

The product of its digits is 466560, while the sum is 46.

The spelling of 2121666592321 in words is "two trillion, one hundred twenty-one billion, six hundred sixty-six million, five hundred ninety-two thousand, three hundred twenty-one".