6381011321 has 4 divisors (see below), whose sum is σ = 6383459700. Its totient is φ = 6378562944.

The previous prime is 6381011297. The next prime is 6381011333. The reversal of 6381011321 is 1231101836.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4025268025 + 2355743296 = 63445^2 + 48536^2 .

It is a cyclic number.

It is not a de Polignac number, because 6381011321 - 2¹⁰ = 6381010297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6381011341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1220276 + ... + 1225493.

It is an arithmetic number, because the mean of its divisors is an integer number (1595864925).

Almost surely, 2^6381011321 is an apocalyptic number.

It is an amenable number.

6381011321 is a deficient number, since it is larger than the sum of its proper divisors (2448379).

6381011321 is a wasteful number, since it uses less digits than its factorization.

6381011321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2448378.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 6381011321 is about 79881.2325956479. The cubic root of 6381011321 is about 1854.7975136129.

The spelling of 6381011321 in words is "six billion, three hundred eighty-one million, eleven thousand, three hundred twenty-one".