21603266103621 has 8 divisors (see below), whose sum is σ = 28804383299520. Its totient is φ = 14402163155072.

The previous prime is 21603266103563. The next prime is 21603266103631. The reversal of 21603266103621 is 12630166230612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21603266103621 - 2¹⁹ = 21603265579333 is a prime.

It is a super-2 number, since 2×21603266103621² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21603266103621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21603266103631) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 707125 + ... + 6611093.

It is an arithmetic number, because the mean of its divisors is an integer number (3600547912440).

Almost surely, 2^{21603266103621} is an apocalyptic number.

It is an amenable number.

21603266103621 is a deficient number, since it is larger than the sum of its proper divisors (7201117195899).

21603266103621 is a wasteful number, since it uses less digits than its factorization.

21603266103621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7123675.

The product of its (nonzero) digits is 93312, while the sum is 39.

The spelling of 21603266103621 in words is "twenty-one trillion, six hundred three billion, two hundred sixty-six million, one hundred three thousand, six hundred twenty-one".