21223220310203 has 16 divisors (see below), whose sum is σ = 21504600821760. Its totient is φ = 20942162280000.

The previous prime is 21223220310121. The next prime is 21223220310293. The reversal of 21223220310203 is 30201302232212.

It is a cyclic number.

It is not a de Polignac number, because 21223220310203 - 2¹⁴ = 21223220293819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21223220310293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1103584598 + ... + 1103603828.

It is an arithmetic number, because the mean of its divisors is an integer number (1344037551360).

Almost surely, 2^{21223220310203} is an apocalyptic number.

21223220310203 is a deficient number, since it is larger than the sum of its proper divisors (281380511557).

21223220310203 is a wasteful number, since it uses less digits than its factorization.

21223220310203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26858.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21223220310203 its reverse (30201302232212), we get a palindrome (51424522542415).

The spelling of 21223220310203 in words is "twenty-one trillion, two hundred twenty-three billion, two hundred twenty million, three hundred ten thousand, two hundred three".