21113311030223 has 4 divisors (see below), whose sum is σ = 21604318263528. Its totient is φ = 20622303796920.

The previous prime is 21113311030211. The next prime is 21113311030349. The reversal of 21113311030223 is 32203011331112.

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 21113311030223 - 2²⁶ = 21113243921359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113311030523) 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, 245503616588 + ... + 245503616673.

It is an arithmetic number, because the mean of its divisors is an integer number (5401079565882).

Almost surely, 2^{21113311030223} is an apocalyptic number.

21113311030223 is a deficient number, since it is larger than the sum of its proper divisors (491007233305).

21113311030223 is an equidigital number, since it uses as much as digits as its factorization.

21113311030223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491007233304.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 21113311030223 its reverse (32203011331112), we get a palindrome (53316322361335).

The spelling of 21113311030223 in words is "twenty-one trillion, one hundred thirteen billion, three hundred eleven million, thirty thousand, two hundred twenty-three".