21343111000 has 32 divisors (see below), whose sum is σ = 49942882080. Its totient is φ = 8537244000.

The previous prime is 21343110991. The next prime is 21343111007. The reversal of 21343111000 is 11134312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21343111007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10670556 + ... + 10672555.

It is an arithmetic number, because the mean of its divisors is an integer number (1560715065).

Almost surely, 2^21343111000 is an apocalyptic number.

21343111000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21343111000 is an abundant number, since it is smaller than the sum of its proper divisors (28599771080).

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

21343111000 is a wasteful number, since it uses less digits than its factorization.

21343111000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21343132 (or 21343118 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21343111000 its reverse (11134312), we get a palindrome (21354245312).

The spelling of 21343111000 in words is "twenty-one billion, three hundred forty-three million, one hundred eleven thousand".