21321322232101 has 16 divisors (see below), whose sum is σ = 21608643079296. Its totient is φ = 21035591666496.

The previous prime is 21321322232059. The next prime is 21321322232129. The reversal of 21321322232101 is 10123222312312.

It is a cyclic number.

It is not a de Polignac number, because 21321322232101 - 2¹⁷ = 21321322101029 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 (21321322232201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96553051 + ... + 96773623.

It is an arithmetic number, because the mean of its divisors is an integer number (1350540192456).

Almost surely, 2^{21321322232101} is an apocalyptic number.

It is an amenable number.

21321322232101 is a deficient number, since it is larger than the sum of its proper divisors (287320847195).

21321322232101 is a wasteful number, since it uses less digits than its factorization.

21321322232101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224172.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 21321322232101 its reverse (10123222312312), we get a palindrome (31444544544413).

The spelling of 21321322232101 in words is "twenty-one trillion, three hundred twenty-one billion, three hundred twenty-two million, two hundred thirty-two thousand, one hundred one".