21002114313223 has 4 divisors (see below), whose sum is σ = 21726325151640. Its totient is φ = 20277903474808.

The previous prime is 21002114313209. The next prime is 21002114313287. The reversal of 21002114313223 is 32231341120012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21002114313223 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 (21002114313293) 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, 362105419165 + ... + 362105419222.

It is an arithmetic number, because the mean of its divisors is an integer number (5431581287910).

Almost surely, 2^{21002114313223} is an apocalyptic number.

21002114313223 is a deficient number, since it is larger than the sum of its proper divisors (724210838417).

21002114313223 is an equidigital number, since it uses as much as digits as its factorization.

21002114313223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724210838416.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 21002114313223 its reverse (32231341120012), we get a palindrome (53233455433235).

The spelling of 21002114313223 in words is "twenty-one trillion, two billion, one hundred fourteen million, three hundred thirteen thousand, two hundred twenty-three".