21001111300223 has 16 divisors (see below), whose sum is σ = 21847980288000. Its totient is φ = 20165247030240.

The previous prime is 21001111300193. The next prime is 21001111300231. The reversal of 21001111300223 is 32200311110012.

It is a cyclic number.

It is not a de Polignac number, because 21001111300223 - 2¹⁶ = 21001111234687 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 (21001111300243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 442508 + ... + 6496001.

It is an arithmetic number, because the mean of its divisors is an integer number (1365498768000).

Almost surely, 2^{21001111300223} is an apocalyptic number.

21001111300223 is a deficient number, since it is larger than the sum of its proper divisors (846868987777).

21001111300223 is a wasteful number, since it uses less digits than its factorization.

21001111300223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6939302.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21001111300223 its reverse (32200311110012), we get a palindrome (53201422410235).

The spelling of 21001111300223 in words is "twenty-one trillion, one billion, one hundred eleven million, three hundred thousand, two hundred twenty-three".