21414330221 has 8 divisors (see below), whose sum is σ = 21439584000. Its totient is φ = 21389094720.

The previous prime is 21414330199. The next prime is 21414330239. The reversal of 21414330221 is 12203341412.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21414330221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21414330281) 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, 4430276 + ... + 4435106.

It is an arithmetic number, because the mean of its divisors is an integer number (2679948000).

Almost surely, 2^21414330221 is an apocalyptic number.

It is an amenable number.

21414330221 is a deficient number, since it is larger than the sum of its proper divisors (25253779).

21414330221 is a wasteful number, since it uses less digits than its factorization.

21414330221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9139.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21414330221 its reverse (12203341412), we get a palindrome (33617671633).

The spelling of 21414330221 in words is "twenty-one billion, four hundred fourteen million, three hundred thirty thousand, two hundred twenty-one".