21033110001000 has 128 divisors (see below), whose sum is σ = 65884752984960. Its totient is φ = 5586483200000.

The previous prime is 21033110000993. The next prime is 21033110001083. The reversal of 21033110001000 is 10001133012.

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

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 31 ways as a sum of consecutive naturals, for example, 13213209 + ... + 14719208.

It is an arithmetic number, because the mean of its divisors is an integer number (514724632695).

Almost surely, 2^{21033110001000} is an apocalyptic number.

21033110001000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21033110001000 is an abundant number, since it is smaller than the sum of its proper divisors (44851642983960).

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

21033110001000 is a wasteful number, since it uses less digits than its factorization.

21033110001000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27932692 (or 27932678 counting only the distinct ones).

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

Adding to 21033110001000 its reverse (10001133012), we get a palindrome (21043111134012).

The spelling of 21033110001000 in words is "twenty-one trillion, thirty-three billion, one hundred ten million, one thousand".