21100301321 has 16 divisors (see below), whose sum is σ = 23119680960. Its totient is φ = 19097897280.

The previous prime is 21100301317. The next prime is 21100301347. The reversal of 21100301321 is 12310300112.

It is not a de Polignac number, because 21100301321 - 2² = 21100301317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21100301296 and 21100301305.

It is not an unprimeable number, because it can be changed into a prime (21100301351) 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, 6302570 + ... + 6305916.

It is an arithmetic number, because the mean of its divisors is an integer number (1444980060).

Almost surely, 2^21100301321 is an apocalyptic number.

It is an amenable number.

21100301321 is a deficient number, since it is larger than the sum of its proper divisors (2019379639).

21100301321 is a wasteful number, since it uses less digits than its factorization.

21100301321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5704.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21100301321 its reverse (12310300112), we get a palindrome (33410601433).

The spelling of 21100301321 in words is "twenty-one billion, one hundred million, three hundred one thousand, three hundred twenty-one".