21210220223003 has 16 divisors (see below), whose sum is σ = 24651352719360. Its totient is φ = 17871869219136.

The previous prime is 21210220222991. The next prime is 21210220223039. The reversal of 21210220223003 is 30032202201212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21210220223003 - 2²⁰ = 21210219174427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21210220223053) 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, 54679151 + ... + 55065687.

It is an arithmetic number, because the mean of its divisors is an integer number (1540709544960).

Almost surely, 2^{21210220223003} is an apocalyptic number.

21210220223003 is a deficient number, since it is larger than the sum of its proper divisors (3441132496357).

21210220223003 is a wasteful number, since it uses less digits than its factorization.

21210220223003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519466.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21210220223003 its reverse (30032202201212), we get a palindrome (51242422424215).

The spelling of 21210220223003 in words is "twenty-one trillion, two hundred ten billion, two hundred twenty million, two hundred twenty-three thousand, three".