21001103010233 has 4 divisors (see below), whose sum is σ = 21001166559360. Its totient is φ = 21001039461108.

The previous prime is 21001103010211. The next prime is 21001103010257. The reversal of 21001103010233 is 33201030110012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21001103010233 - 2⁶ = 21001103010169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21001103010263) 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 3 ways as a sum of consecutive naturals, for example, 31276253 + ... + 31940666.

It is an arithmetic number, because the mean of its divisors is an integer number (5250291639840).

Almost surely, 2^{21001103010233} is an apocalyptic number.

It is an amenable number.

21001103010233 is a deficient number, since it is larger than the sum of its proper divisors (63549127).

21001103010233 is an equidigital number, since it uses as much as digits as its factorization.

21001103010233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63549126.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21001103010233 its reverse (33201030110012), we get a palindrome (54202133120245).

The spelling of 21001103010233 in words is "twenty-one trillion, one billion, one hundred three million, ten thousand, two hundred thirty-three".