21003001102004 has 12 divisors (see below), whose sum is σ = 36755734163904. Its totient is φ = 10501362769464.

The previous prime is 21003001101917. The next prime is 21003001102007. The reversal of 21003001102004 is 40020110030012.

It is a super-2 number, since 2×21003001102004² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21003001102004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21003001102007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34102022 + ... + 34712445.

It is an arithmetic number, because the mean of its divisors is an integer number (3062977846992).

Almost surely, 2^{21003001102004} is an apocalyptic number.

It is an amenable number.

21003001102004 is a deficient number, since it is larger than the sum of its proper divisors (15752733061900).

21003001102004 is a wasteful number, since it uses less digits than its factorization.

21003001102004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68890774 (or 68890772 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21003001102004 its reverse (40020110030012), we get a palindrome (61023111132016).

The spelling of 21003001102004 in words is "twenty-one trillion, three billion, one million, one hundred two thousand, four".