21102310323 has 16 divisors (see below), whose sum is σ = 31291069440. Its totient is φ = 14055432552.

The previous prime is 21102310321. The next prime is 21102310351. The reversal of 21102310323 is 32301320112.

21102310323 is a `hidden beast` number, since 2 + 110 + 231 + 0 + 323 = 666.

It is not a de Polignac number, because 21102310323 - 2¹ = 21102310321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21102310296 and 21102310305.

It is not an unprimeable number, because it can be changed into a prime (21102310321) 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, 324511 + ... + 384072.

It is an arithmetic number, because the mean of its divisors is an integer number (1955691840).

Almost surely, 2^21102310323 is an apocalyptic number.

21102310323 is a deficient number, since it is larger than the sum of its proper divisors (10188759117).

21102310323 is a wasteful number, since it uses less digits than its factorization.

21102310323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709695 (or 709689 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21102310323 its reverse (32301320112), we get a palindrome (53403630435).

The spelling of 21102310323 in words is "twenty-one billion, one hundred two million, three hundred ten thousand, three hundred twenty-three".