21022310203 has 4 divisors (see below), whose sum is σ = 21022826760. Its totient is φ = 21021793648.

The previous prime is 21022310167. The next prime is 21022310219. The reversal of 21022310203 is 30201322012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21022310203 - 2²¹ = 21020213051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21022310233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191473 + ... + 280546.

It is an arithmetic number, because the mean of its divisors is an integer number (5255706690).

Almost surely, 2^21022310203 is an apocalyptic number.

21022310203 is a deficient number, since it is larger than the sum of its proper divisors (516557).

21022310203 is an equidigital number, since it uses as much as digits as its factorization.

21022310203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516556.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21022310203 its reverse (30201322012), we get a palindrome (51223632215).

The spelling of 21022310203 in words is "twenty-one billion, twenty-two million, three hundred ten thousand, two hundred three".