21303111000 has 64 divisors (see below), whose sum is σ = 66465715680. Its totient is φ = 5680828800.

The previous prime is 21303110989. The next prime is 21303111017. The reversal of 21303111000 is 11130312.

It is a Harshad number since it is a multiple of its sum of digits (12).

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 15 ways as a sum of consecutive naturals, for example, 3547519 + ... + 3553518.

Almost surely, 2^21303111000 is an apocalyptic number.

21303111000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21303111000 is an abundant number, since it is smaller than the sum of its proper divisors (45162604680).

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

21303111000 is a wasteful number, since it uses less digits than its factorization.

21303111000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7101061 (or 7101047 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 21303111000 its reverse (11130312), we get a palindrome (21314241312).

The spelling of 21303111000 in words is "twenty-one billion, three hundred three million, one hundred eleven thousand".