21882661321 has 4 divisors (see below), whose sum is σ = 21884200912. Its totient is φ = 21881121732.

The previous prime is 21882661301. The next prime is 21882661373. The reversal of 21882661321 is 12316628812.

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 21882661321 - 2⁹ = 21882660809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21882661301) 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, 748275 + ... + 776968.

It is an arithmetic number, because the mean of its divisors is an integer number (5471050228).

Almost surely, 2^21882661321 is an apocalyptic number.

It is an amenable number.

21882661321 is a deficient number, since it is larger than the sum of its proper divisors (1539591).

21882661321 is a wasteful number, since it uses less digits than its factorization.

21882661321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1539590.

The product of its digits is 55296, while the sum is 40.

The spelling of 21882661321 in words is "twenty-one billion, eight hundred eighty-two million, six hundred sixty-one thousand, three hundred twenty-one".