21033021104 has 40 divisors (see below), whose sum is σ = 40939046400. Its totient is φ = 10468180800.

The previous prime is 21033021091. The next prime is 21033021127. The reversal of 21033021104 is 40112033012.

It is a super-2 number, since 2×21033021104² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9100109 + ... + 9102419.

It is an arithmetic number, because the mean of its divisors is an integer number (1023476160).

Almost surely, 2^21033021104 is an apocalyptic number.

It is an amenable number.

21033021104 is a deficient number, since it is larger than the sum of its proper divisors (19906025296).

21033021104 is a wasteful number, since it uses less digits than its factorization.

21033021104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4689 (or 4683 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21033021104 its reverse (40112033012), we get a palindrome (61145054116).

The spelling of 21033021104 in words is "twenty-one billion, thirty-three million, twenty-one thousand, one hundred four".