21312000223 has 8 divisors (see below), whose sum is σ = 21430791936. Its totient is φ = 21193284000.

The previous prime is 21312000197. The next prime is 21312000239. The reversal of 21312000223 is 32200021312.

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 21312000223 - 2⁵ = 21312000191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21312000197 and 21312000206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21312000263) 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, 604173 + ... + 638473.

It is an arithmetic number, because the mean of its divisors is an integer number (2678848992).

Almost surely, 2^21312000223 is an apocalyptic number.

21312000223 is a deficient number, since it is larger than the sum of its proper divisors (118791713).

21312000223 is a wasteful number, since it uses less digits than its factorization.

21312000223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37745.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21312000223 its reverse (32200021312), we get a palindrome (53512021535).

The spelling of 21312000223 in words is "twenty-one billion, three hundred twelve million, two hundred twenty-three", and thus it is an aban number.