21110231020321 has 16 divisors (see below), whose sum is σ = 22956826104576. Its totient is φ = 19330870945536.

The previous prime is 21110231020313. The next prime is 21110231020327. The reversal of 21110231020321 is 12302013201112.

It is a cyclic number.

It is not a de Polignac number, because 21110231020321 - 2³ = 21110231020313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21110231020327) 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, 20562210 + ... + 21564436.

It is an arithmetic number, because the mean of its divisors is an integer number (1434801631536).

Almost surely, 2^{21110231020321} is an apocalyptic number.

It is an amenable number.

21110231020321 is a deficient number, since it is larger than the sum of its proper divisors (1846595084255).

21110231020321 is a wasteful number, since it uses less digits than its factorization.

21110231020321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035768.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21110231020321 its reverse (12302013201112), we get a palindrome (33412244221433).

The spelling of 21110231020321 in words is "twenty-one trillion, one hundred ten billion, two hundred thirty-one million, twenty thousand, three hundred twenty-one".