2989921681321 has 15 divisors (see below), whose sum is σ = 3038489484493. Its totient is φ = 2942130008500.

The previous prime is 2989921681309. The next prime is 2989921681393. The reversal of 2989921681321 is 1231861299892.

The square root of 2989921681321 is 1729139.

It is a perfect power (a square), and thus also a powerful number.

2989921681321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2989921681321 - 2²³ = 2989913292713 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 2989921681321.

It is not an unprimeable number, because it can be changed into a prime (2989921681301) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 11912038446 + ... + 11912038696.

Almost surely, 2^{2989921681321} is an apocalyptic number.

2989921681321 is the 1729139-th square number.

2989921681321 is the 864570-th centered octagonal number.

It is an amenable number.

2989921681321 is a deficient number, since it is larger than the sum of its proper divisors (48567803172).

2989921681321 is an frugal number, since it uses more digits than its factorization.

2989921681321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834 (or 334 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 61.

The spelling of 2989921681321 in words is "two trillion, nine hundred eighty-nine billion, nine hundred twenty-one million, six hundred eighty-one thousand, three hundred twenty-one".