21123335000 has 40 divisors (see below), whose sum is σ = 49491985620. Its totient is φ = 8449332000.

The previous prime is 21123334943. The next prime is 21123335003. The reversal of 21123335000 is 53332112.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21123335003) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2107334 + ... + 2117333.

Almost surely, 2^21123335000 is an apocalyptic number.

21123335000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21123335000 is an abundant number, since it is smaller than the sum of its proper divisors (28368650620).

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

21123335000 is an equidigital number, since it uses as much as digits as its factorization.

21123335000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4224693 (or 4224674 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 20.

Adding to 21123335000 its reverse (53332112), we get a palindrome (21176667112).

The spelling of 21123335000 in words is "twenty-one billion, one hundred twenty-three million, three hundred thirty-five thousand".