21013201223 has 32 divisors (see below), whose sum is σ = 25136821248. Its totient is φ = 17192736000.

The previous prime is 21013201207. The next prime is 21013201241. The reversal of 21013201223 is 32210231012.

It is not a de Polignac number, because 21013201223 - 2⁴ = 21013201207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21013201823) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2899961 + ... + 2907197.

It is an arithmetic number, because the mean of its divisors is an integer number (785525664).

Almost surely, 2^21013201223 is an apocalyptic number.

21013201223 is a deficient number, since it is larger than the sum of its proper divisors (4123620025).

21013201223 is a wasteful number, since it uses less digits than its factorization.

21013201223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7503.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21013201223 its reverse (32210231012), we get a palindrome (53223432235).

The spelling of 21013201223 in words is "twenty-one billion, thirteen million, two hundred one thousand, two hundred twenty-three".