21103311321203 has 8 divisors (see below), whose sum is σ = 21115213642656. Its totient is φ = 21091412320000.

The previous prime is 21103311321133. The next prime is 21103311321217. The reversal of 21103311321203 is 30212311330112.

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 21103311321203 - 2¹⁴ = 21103311304819 is a prime.

It is a super-2 number, since 2×21103311321203² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21103311321293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11940725 + ... + 13593657.

It is an arithmetic number, because the mean of its divisors is an integer number (2639401705332).

Almost surely, 2^{21103311321203} is an apocalyptic number.

21103311321203 is a deficient number, since it is larger than the sum of its proper divisors (11902321453).

21103311321203 is a wasteful number, since it uses less digits than its factorization.

21103311321203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1660125.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 21103311321203 its reverse (30212311330112), we get a palindrome (51315622651315).

The spelling of 21103311321203 in words is "twenty-one trillion, one hundred three billion, three hundred eleven million, three hundred twenty-one thousand, two hundred three".