203021230003221 has 16 divisors (see below), whose sum is σ = 315679269200000. Its totient is φ = 116012131429824.

The previous prime is 203021230003211. The next prime is 203021230003231. The reversal of 203021230003221 is 122300032120302.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (203021230003211) and next prime (203021230003231).

It is not a de Polignac number, because 203021230003221 - 2¹⁴ = 203021229986837 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203021230003201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98649770596 + ... + 98649772653.

It is an arithmetic number, because the mean of its divisors is an integer number (19729954325000).

Almost surely, 2^{203021230003221} is an apocalyptic number.

203021230003221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

203021230003221 is a deficient number, since it is larger than the sum of its proper divisors (112658039196779).

203021230003221 is an equidigital number, since it uses as much as digits as its factorization.

203021230003221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197299543273 (or 197299543259 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 203021230003221 its reverse (122300032120302), we get a palindrome (325321262123523).

The spelling of 203021230003221 in words is "two hundred three trillion, twenty-one billion, two hundred thirty million, three thousand, two hundred twenty-one".