21103212332321 has 8 divisors (see below), whose sum is σ = 25536660301440. Its totient is φ = 17024440200768.

The previous prime is 21103212332299. The next prime is 21103212332359. The reversal of 21103212332321 is 12323321230112.

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

It is not a de Polignac number, because 21103212332321 - 2²² = 21103208138017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21103212332221) 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, 88668959261 + ... + 88668959498.

It is an arithmetic number, because the mean of its divisors is an integer number (3192082537680).

Almost surely, 2^{21103212332321} is an apocalyptic number.

It is an amenable number.

21103212332321 is a deficient number, since it is larger than the sum of its proper divisors (4433447969119).

21103212332321 is a wasteful number, since it uses less digits than its factorization.

21103212332321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177337918783.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 21103212332321 its reverse (12323321230112), we get a palindrome (33426533562433).

The spelling of 21103212332321 in words is "twenty-one trillion, one hundred three billion, two hundred twelve million, three hundred thirty-two thousand, three hundred twenty-one".