21211002002104 has 32 divisors (see below), whose sum is σ = 40697473267440. Its totient is φ = 10358366054400.

The previous prime is 21211002002083. The next prime is 21211002002107. The reversal of 21211002002104 is 40120020011212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211002002107) 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, 5781144 + ... + 8708824.

Almost surely, 2^{21211002002104} is an apocalyptic number.

It is an amenable number.

21211002002104 is a deficient number, since it is larger than the sum of its proper divisors (19486471265336).

21211002002104 is a wasteful number, since it uses less digits than its factorization.

21211002002104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2948791 (or 2948787 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21211002002104 its reverse (40120020011212), we get a palindrome (61331022013316).

The spelling of 21211002002104 in words is "twenty-one trillion, two hundred eleven billion, two million, two thousand, one hundred four".