1029999682321 has 3 divisors (see below), whose sum is σ = 1030000697211. Its totient is φ = 1029998667432.

The previous prime is 1029999682303. The next prime is 1029999682331. The reversal of 1029999682321 is 1232869999201.

The square root of 1029999682321 is 1014889.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 527205235921 + 502794446400 = 726089^2 + 709080^2 .

It is not a de Polignac number, because 1029999682321 - 2⁵ = 1029999682289 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 1029999682321.

It is not an unprimeable number, because it can be changed into a prime (1029999682301) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 507445 + ... + 1522333.

It is an arithmetic number, because the mean of its divisors is an integer number (343333565737).

Almost surely, 2^{1029999682321} is an apocalyptic number.

1029999682321 is the 1014889-th square number.

1029999682321 is the 507445-th centered octagonal number.

It is an amenable number.

1029999682321 is a deficient number, since it is larger than the sum of its proper divisors (1014890).

1029999682321 is an frugal number, since it uses more digits than its factorization.

1029999682321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2029778 (or 1014889 counting only the distinct ones).

The product of its (nonzero) digits is 7558272, while the sum is 61.

The spelling of 1029999682321 in words is "one trillion, twenty-nine billion, nine hundred ninety-nine million, six hundred eighty-two thousand, three hundred twenty-one".