21312110101223 has 8 divisors (see below), whose sum is σ = 21324537748800. Its totient is φ = 21299684984928.

The previous prime is 21312110101211. The next prime is 21312110101229. The reversal of 21312110101223 is 32210101121312.

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 21312110101223 - 2¹² = 21312110097127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21312110101195 and 21312110101204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21312110101229) 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, 16343618 + ... + 17599376.

It is an arithmetic number, because the mean of its divisors is an integer number (2665567218600).

Almost surely, 2^{21312110101223} is an apocalyptic number.

21312110101223 is a deficient number, since it is larger than the sum of its proper divisors (12427647577).

21312110101223 is a wasteful number, since it uses less digits than its factorization.

21312110101223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1265641.

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

Adding to 21312110101223 its reverse (32210101121312), we get a palindrome (53522211222535).

The spelling of 21312110101223 in words is "twenty-one trillion, three hundred twelve billion, one hundred ten million, one hundred one thousand, two hundred twenty-three".