21104421003 has 12 divisors (see below), whose sum is σ = 30488316768. Its totient is φ = 14067697200.

The previous prime is 21104420999. The next prime is 21104421011. The reversal of 21104421003 is 30012440112.

21104421003 is a `hidden beast` number, since 211 + 0 + 442 + 10 + 0 + 3 = 666.

It is not a de Polignac number, because 21104421003 - 2² = 21104420999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21104521003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88323 + ... + 223628.

It is an arithmetic number, because the mean of its divisors is an integer number (2540693064).

Almost surely, 2^21104421003 is an apocalyptic number.

21104421003 is a deficient number, since it is larger than the sum of its proper divisors (9383895765).

21104421003 is a wasteful number, since it uses less digits than its factorization.

21104421003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319474 (or 319471 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21104421003 its reverse (30012440112), we get a palindrome (51116861115).

The spelling of 21104421003 in words is "twenty-one billion, one hundred four million, four hundred twenty-one thousand, three".