21323230110 has 96 divisors (see below), whose sum is σ = 68234362560. Its totient is φ = 4498965504.

The previous prime is 21323230091. The next prime is 21323230207. The reversal of 21323230110 is 1103232312.

21323230110 is a `hidden beast` number, since 2 + 1 + 323 + 230 + 110 = 666.

It is a super-2 number, since 2×21323230110² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1293595 + ... + 1309974.

It is an arithmetic number, because the mean of its divisors is an integer number (710774610).

Almost surely, 2^21323230110 is an apocalyptic number.

21323230110 is an abundant number, since it is smaller than the sum of its proper divisors (46911132450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21323230110 is a wasteful number, since it uses less digits than its factorization.

21323230110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2603602 (or 2603599 counting only the distinct ones).

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

Adding to 21323230110 its reverse (1103232312), we get a palindrome (22426462422).

It can be divided in two parts, 213232 and 30110, that added together give a palindrome (243342).

The spelling of 21323230110 in words is "twenty-one billion, three hundred twenty-three million, two hundred thirty thousand, one hundred ten".