21110310212321 has 8 divisors (see below), whose sum is σ = 23035878379488. Its totient is φ = 19185816888000.

The previous prime is 21110310212297. The next prime is 21110310212347. The reversal of 21110310212321 is 12321201301112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21110310212321 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 = 21110310212293 and 21110310212302.

It is not an unprimeable number, because it can be changed into a prime (21110310212371) 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, 268669640 + ... + 268748201.

It is an arithmetic number, because the mean of its divisors is an integer number (2879484797436).

Almost surely, 2^{21110310212321} is an apocalyptic number.

It is an amenable number.

21110310212321 is a deficient number, since it is larger than the sum of its proper divisors (1925568167167).

21110310212321 is a wasteful number, since it uses less digits than its factorization.

21110310212321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537421423.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 21110310212321 its reverse (12321201301112), we get a palindrome (33431511513433).

The spelling of 21110310212321 in words is "twenty-one trillion, one hundred ten billion, three hundred ten million, two hundred twelve thousand, three hundred twenty-one".