21332130221 has 8 divisors (see below), whose sum is σ = 21538954080. Its totient is φ = 21125444688.

The previous prime is 21332130199. The next prime is 21332130277. The reversal of 21332130221 is 12203123312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21332130221 - 2³⁴ = 4152261037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21332130193 and 21332130202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21332130821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 290015 + ... + 356051.

It is an arithmetic number, because the mean of its divisors is an integer number (2692369260).

Almost surely, 2^21332130221 is an apocalyptic number.

It is an amenable number.

21332130221 is a deficient number, since it is larger than the sum of its proper divisors (206823859).

21332130221 is a wasteful number, since it uses less digits than its factorization.

21332130221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69163.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21332130221 its reverse (12203123312), we get a palindrome (33535253533).

The spelling of 21332130221 in words is "twenty-one billion, three hundred thirty-two million, one hundred thirty thousand, two hundred twenty-one".