21011010032203 has 4 divisors (see below), whose sum is σ = 21407444183808. Its totient is φ = 20614575880600.

The previous prime is 21011010032191. The next prime is 21011010032231. The reversal of 21011010032203 is 30223001011012.

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 21011010032203 - 2⁵ = 21011010032171 is a prime.

It is a super-2 number, since 2×21011010032203² (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 (21011010032293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198217075723 + ... + 198217075828.

It is an arithmetic number, because the mean of its divisors is an integer number (5351861045952).

Almost surely, 2^{21011010032203} is an apocalyptic number.

21011010032203 is a deficient number, since it is larger than the sum of its proper divisors (396434151605).

21011010032203 is an equidigital number, since it uses as much as digits as its factorization.

21011010032203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396434151604.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21011010032203 its reverse (30223001011012), we get a palindrome (51234011043215).

The spelling of 21011010032203 in words is "twenty-one trillion, eleven billion, ten million, thirty-two thousand, two hundred three".