21010232220203 has 4 divisors (see below), whose sum is σ = 21010458329280. Its totient is φ = 21010006111128.

The previous prime is 21010232220191. The next prime is 21010232220233. The reversal of 21010232220203 is 30202223201012.

It is a happy number.

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 21010232220203 - 2¹⁴ = 21010232203819 is a prime.

It is a super-2 number, since 2×21010232220203² (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 (21010232220233) 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, 112915100 + ... + 113101017.

It is an arithmetic number, because the mean of its divisors is an integer number (5252614582320).

Almost surely, 2^{21010232220203} is an apocalyptic number.

21010232220203 is a deficient number, since it is larger than the sum of its proper divisors (226109077).

21010232220203 is an equidigital number, since it uses as much as digits as its factorization.

21010232220203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226109076.

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

Adding to 21010232220203 its reverse (30202223201012), we get a palindrome (51212455421215).

The spelling of 21010232220203 in words is "twenty-one trillion, ten billion, two hundred thirty-two million, two hundred twenty thousand, two hundred three".