21101323000 has 32 divisors (see below), whose sum is σ = 49377098160. Its totient is φ = 8440528800.

The previous prime is 21101322997. The next prime is 21101323027. The reversal of 21101323000 is 32310112.

It is a congruent number.

It is an unprimeable number.

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, 10549662 + ... + 10551661.

Almost surely, 2^21101323000 is an apocalyptic number.

21101323000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21101323000 is an abundant number, since it is smaller than the sum of its proper divisors (28275775160).

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

21101323000 is a wasteful number, since it uses less digits than its factorization.

21101323000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21101344 (or 21101330 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 21101323000 its reverse (32310112), we get a palindrome (21133633112).

The spelling of 21101323000 in words is "twenty-one billion, one hundred one million, three hundred twenty-three thousand".