21203220320203 has 8 divisors (see below), whose sum is σ = 21210355071360. Its totient is φ = 21196086065280.

The previous prime is 21203220320173. The next prime is 21203220320239. The reversal of 21203220320203 is 30202302230212.

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 21203220320203 - 2¹⁷ = 21203220189131 is a prime.

It is a super-2 number, since 2×21203220320203² (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 (21203220320003) 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, 98300893 + ... + 98516353.

It is an arithmetic number, because the mean of its divisors is an integer number (2651294383920).

Almost surely, 2^{21203220320203} is an apocalyptic number.

21203220320203 is a deficient number, since it is larger than the sum of its proper divisors (7134751157).

21203220320203 is a wasteful number, since it uses less digits than its factorization.

21203220320203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248117.

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 21203220320203 its reverse (30202302230212), we get a palindrome (51405522550415).

The spelling of 21203220320203 in words is "twenty-one trillion, two hundred three billion, two hundred twenty million, three hundred twenty thousand, two hundred three".