21101121330321 has 8 divisors (see below), whose sum is σ = 28340192152224. Its totient is φ = 13964732364320.

The previous prime is 21101121330313. The next prime is 21101121330353. The reversal of 21101121330321 is 12303312110112.

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 21101121330321 - 2³ = 21101121330313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21101121330361) 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, 25670463495 + ... + 25670464316.

It is an arithmetic number, because the mean of its divisors is an integer number (3542524019028).

Almost surely, 2^{21101121330321} is an apocalyptic number.

It is an amenable number.

21101121330321 is a deficient number, since it is larger than the sum of its proper divisors (7239070821903).

21101121330321 is a wasteful number, since it uses less digits than its factorization.

21101121330321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51340927951.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 21101121330321 its reverse (12303312110112), we get a palindrome (33404433440433).

The spelling of 21101121330321 in words is "twenty-one trillion, one hundred one billion, one hundred twenty-one million, three hundred thirty thousand, three hundred twenty-one".