5681212321 has 4 divisors (see below), whose sum is σ = 5681393200. Its totient is φ = 5681031444.

The previous prime is 5681212307. The next prime is 5681212343. The reversal of 5681212321 is 1232121865.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5681212321 - 2⁷ = 5681212193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5681212421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29751 + ... + 110668.

It is an arithmetic number, because the mean of its divisors is an integer number (1420348300).

Almost surely, 2^5681212321 is an apocalyptic number.

It is an amenable number.

5681212321 is a deficient number, since it is larger than the sum of its proper divisors (180879).

5681212321 is a wasteful number, since it uses less digits than its factorization.

5681212321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180878.

The product of its digits is 5760, while the sum is 31.

The square root of 5681212321 is about 75373.8172112837. The cubic root of 5681212321 is about 1784.3512115656.

The spelling of 5681212321 in words is "five billion, six hundred eighty-one million, two hundred twelve thousand, three hundred twenty-one".