21320101331221 has 8 divisors (see below), whose sum is σ = 26580905555904. Its totient is φ = 16613065972320.

The previous prime is 21320101331197. The next prime is 21320101331237. The reversal of 21320101331221 is 12213310102312.

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 21320101331221 - 2⁹ = 21320101330709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21320101331192 and 21320101331201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320101331021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138442216360 + ... + 138442216513.

It is an arithmetic number, because the mean of its divisors is an integer number (3322613194488).

Almost surely, 2^{21320101331221} is an apocalyptic number.

It is an amenable number.

21320101331221 is a deficient number, since it is larger than the sum of its proper divisors (5260804224683).

21320101331221 is a wasteful number, since it uses less digits than its factorization.

21320101331221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276884432891.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21320101331221 its reverse (12213310102312), we get a palindrome (33533411433533).

The spelling of 21320101331221 in words is "twenty-one trillion, three hundred twenty billion, one hundred one million, three hundred thirty-one thousand, two hundred twenty-one".