21012110223203 has 8 divisors (see below), whose sum is σ = 23455378854336. Its totient is φ = 18657687724200.

The previous prime is 21012110223187. The next prime is 21012110223211. The reversal of 21012110223203 is 30232201121012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21012110223203 - 2⁴ = 21012110223187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21012110223283) 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 7 ways as a sum of consecutive naturals, for example, 22211532533 + ... + 22211533478.

It is an arithmetic number, because the mean of its divisors is an integer number (2931922356792).

Almost surely, 2^{21012110223203} is an apocalyptic number.

21012110223203 is a deficient number, since it is larger than the sum of its proper divisors (2443268631133).

21012110223203 is a wasteful number, since it uses less digits than its factorization.

21012110223203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44423066065.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21012110223203 its reverse (30232201121012), we get a palindrome (51244311344215).

The spelling of 21012110223203 in words is "twenty-one trillion, twelve billion, one hundred ten million, two hundred twenty-three thousand, two hundred three".