21102012000223 has 24 divisors (see below), whose sum is σ = 26791244957520. Its totient is φ = 16435488021120.

The previous prime is 21102012000137. The next prime is 21102012000229. The reversal of 21102012000223 is 32200021020112.

It is a happy number.

It is not a de Polignac number, because 21102012000223 - 2⁹ = 21102011999711 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21102012000197 and 21102012000206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102012000229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7931568 + ... + 10252501.

It is an arithmetic number, because the mean of its divisors is an integer number (1116301873230).

Almost surely, 2^{21102012000223} is an apocalyptic number.

21102012000223 is a deficient number, since it is larger than the sum of its proper divisors (5689232957297).

21102012000223 is a wasteful number, since it uses less digits than its factorization.

21102012000223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18186247 (or 18186240 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21102012000223 its reverse (32200021020112), we get a palindrome (53302033020335).

The spelling of 21102012000223 in words is "twenty-one trillion, one hundred two billion, twelve million, two hundred twenty-three", and thus it is an aban number.